version="2.05 200304917
<system Testing Version ">
Envorement and IP=152.163.188.195 cache-rg03.proxy.aol.com email= Mozilla/4.0 (compatible; MSIE 5.0; AOL 6.0; Windows 98; DigExt)<what_best_describes_you =Student>
<How_much_math_have_you_had =Am currently in algebra>
<grade =7th or 8th Grade>
<demo status="T">
<describe_your_use ="defualt Use">
<teachersname ="defualtTecherName">
<forced status="NIL">
<Name value="sacred heart.txt">IBM PC CompatibleGS260Unknown Intel processor level 6UnknownWindows NT4.0 (build 1381) Service Pack 5
They heard from "neil ripped out this question while debugging"
Begun
<FileName>p_anne_AlgebraSymb.lisp</FileName>
<stats cpn="1" nsd="0" ncir="0" mpn="1" msn="17" mlfcs="1" str="is" rspl="NIL" >
<Problem_Statement>Anne is rowing a boat in a lake and is 800 yards from the dock from which she started. She rows back towards the dock at 40 yards per minute for "m" minutes and stops to rest. How far is she from the dock now?</Problem_Statement>
<Tutor time="[10/12/2001][17:41:8][1]" qtype="QSYMB" goal="800-40*m">Hello. Please write an expression for the distance Anne has left to row. </Tutor>
<Student time="[10/12/2001][17:43:54][166]">40/800=mX40</Student>
[10/12/2001][17:45:4][70]<Student told that thier answer is wrong because it had a varaible that was not in the problem "40/800=m*x*40">
[10/12/2001][17:45:12][8]<Had Equal sign- Ttold not to use equaing_but not given chance to change it"40/800=m*x*40">
<Tutor time="[10/12/2001][17:45:12][0]" qtype="QCOMPUTE" goal="680"> Hmm. No. We will come back to the distance Anne has left to row. Let me try to break this down for you. Please compute the distance Anne has left to row if the number of minutes rowing was 3 minutes? </Tutor>
<Student time="[10/12/2001][17:46:42][90]">40/800*3</Student>
<Tutor time="[10/12/2001][17:46:42][0]" qtype="QCOMPUTE" goal="40*3"> Hmm. No. Let me ask you a different question. Please compute the distance rowed so far if the number of minutes rowing was 3 minutes? </Tutor>
<Student time="[10/12/2001][17:46:58][16]">40*3</Student>
<Tutor time="[10/12/2001][17:46:58][0]" qtype="QCOMPUTE" goal="680">Correct. Now, lets try this question again: Please compute the distance Anne has left to row if the number of minutes rowing was 3 minutes? </Tutor>
<Student time="[10/12/2001][17:47:15][17]">40*3/800</Student>
<Tutor time="[10/12/2001][17:47:15][0]" qtype="QCOMPUTE" goal="680"> Hmm. No. Try again please. If the number of minutes rowing was 3 minutes instead of "m" what would the distance Anne has left to row be?</Tutor>
<Student time="[10/12/2001][17:48:39][84]">800-40*3</Student>
A stricly higher question was satsified
<Tutor time="[10/12/2001][17:48:39][0]" qtype="QGENERLIZE" goal="800-40*m">Correct. Now use "m" instead of 3 to again express the distance Anne has left to row.</Tutor>
<Student time="[10/12/2001][17:49:3][24]">800-40*m</Student>
<Tutor time="[10/12/2001][17:49:3][0]" qtype="NIL" goal="NIL">Correct. A new problem is needed </Tutor>
<problem_done num="1" name="p_anne_AlgebraSymb.lisp" num_of_attempts="6">
</section>
<FileName>p_anne_AlgebraSymb.lisp</FileName>
<stats cpn="1" nsd="1" ncir="0" mpn="1" msn="17" mlfcs="1" str="verbal" rspl="NIL" >
<Problem_Statement>Anne is rowing a boat in a lake and is 800 yards from the dock from which she started. She rows back towards the dock at 40 yards per minute for "m" minutes and stops to rest. How far is she from the dock now?</Problem_Statement>
<Tutor time="[10/12/2001][17:49:3][0]" qtype="QSYMB" goal="800-40*m">Hello. Please write an expression for the distance Anne has left to row. </Tutor>
<Student time="[10/12/2001][17:49:34][31]">800-40*m</Student>
<Tutor time="[10/12/2001][17:49:34][0]" qtype="NIL" goal="NIL">Correct. A new problem is needed </Tutor>
<problem_done num="1" name="p_anne_AlgebraSymb.lisp" num_of_attempts="1">
</section>
<FileName>p_num_stud_in_class.2op</FileName>
<stats cpn="1" nsd="2" ncir="0" mpn="1" msn="17" mlfcs="1" str="worked" rspl="NIL" >
<Problem_Statement>In math class there are 12 more boys than girls. If the number of girls is "g", write an expression for the total number of students in the class.</Problem_Statement>
<Tutor time="[10/12/2001][17:49:35][1]" qtype="QSYMB" goal="g+(g+12)">Hello. Please write an expression for the total number of students in a class. </Tutor>
<Student time="[10/12/2001][17:50:28][53]">g+(g+12)</Student>
<Tutor time="[10/12/2001][17:50:29][1]" qtype="NIL" goal="NIL">Correct. A new problem is needed </Tutor>
<problem_done num="1" name="p_num_stud_in_class.2op" num_of_attempts="1">
</section>
<FileName>p_CancerFundRaiser.3op.lisp</FileName>
<stats cpn="1" nsd="3" ncir="0" mpn="1" msn="17" mlfcs="1" str="decomp" rspl="NIL" >
<Problem_Statement>Julie was trying to raise money to help fight Cancer. She got 7 students to each donate "s" dollars and "t" teachers to each donate 10 dollars. Write an expression for how much she collected?</Problem_Statement>
<Tutor time="[10/12/2001][17:50:29][0]" qtype="QSYMB" goal="7*s+10*t">Hello. Please write an expression for the total amount Julie collected. </Tutor>
<Student time="[10/12/2001][17:51:18][49]">7s+t10</Student>
<Tutor time="[10/12/2001][17:51:18][0]" qtype="NIL" goal="NIL">Correct. A new problem is needed </Tutor>
<problem_done num="1" name="p_CancerFundRaiser.3op.lisp" num_of_attempts="1">
</section>
<FileName>p_32FistOuncePlus20Cents.3op</FileName>
<stats cpn="1" nsd="4" ncir="0" mpn="1" msn="17" mlfcs="1" str="cut" rspl="NIL" >
<Problem_Statement>The post office charges 33 cents for a one ounce letter. For each additional ounce the post office charges 20 cents. If you mail a "x" ounce letter, how much will it cost you in CENTS?</Problem_Statement>
<Tutor time="[10/12/2001][17:51:18][0]" qtype="QSYMB" goal="33+20*(x-1)">Hello. Please write an expression for the total cost of your letter in cents. </Tutor>
<Student time="[10/12/2001][17:52:44][86]">33x+22x</Student>
<Tutor time="[10/12/2001][17:52:45][1]" qtype="QSYMB" goal="33+20*(x-1)"> Hmm. No. A correct answer is 33+20*(x-1). Please type that.</Tutor>
<Student time="[10/12/2001][17:53:19][34]">33+20*(x-1)</Student>
<Tutor time="[10/12/2001][17:53:19][0]" qtype="NIL" goal="NIL">Correct. A new problem is needed </Tutor>
<problem_done num="1" name="p_32FistOuncePlus20Cents.3op" num_of_attempts="2">
</section>
<FileName>p_two_jobs.lisp</FileName>
<stats cpn="1" nsd="5" ncir="0" mpn="1" msn="17" mlfcs="1" str="decomp" rspl="NIL" >
<Problem_Statement>Debbie has two jobs over the summer. At one job she bags groceries at Giant Eagle and gets paid 5 dollars an hour. At the other job she delivers newspapers and gets paid 7 dollars an hour. She works a total of 30 hours a week. She works "g" hours bagging groceries. Write an expression for the total amount she earns a week.</Problem_Statement>
<Tutor time="[10/12/2001][17:53:20][1]" qtype="QSYMB" goal="5*g+7*(30-g)">Hello. Please write an expression for the total pay per week. </Tutor>
<Student time="[10/12/2001][17:54:27][67]">5g+7(30-g)</Student>
<Tutor time="[10/12/2001][17:54:27][0]" qtype="NIL" goal="NIL">Correct. A new problem is needed </Tutor>
<problem_done num="1" name="p_two_jobs.lisp" num_of_attempts="1">
</section>
<FileName>p_anne_AlgebraSymb.lisp</FileName>
<stats cpn="1" nsd="6" ncir="0" mpn="1" msn="17" mlfcs="1" str="is" rspl="NIL" >
<Problem_Statement>Anne is rowing a boat in a lake and is 800 yards from the dock from which she started. She rows back towards the dock at 40 yards per minute for "m" minutes and stops to rest. How far is she from the dock now?</Problem_Statement>
<Tutor time="[10/12/2001][17:54:28][1]" qtype="QSYMB" goal="800-40*m">Hello. Please write an expression for the distance Anne has left to row. </Tutor>
<Student time="[10/12/2001][17:54:56][28]">800-40*m</Student>
<Tutor time="[10/12/2001][17:54:56][0]" qtype="NIL" goal="NIL">Correct. A new problem is needed </Tutor>
<problem_done num="1" name="p_anne_AlgebraSymb.lisp" num_of_attempts="1">
</section>
PreTest Answers="--sep0--400/x--sep0----sep1--3x--sep1--"
PreTest File=c_one_op_booths_400_d_x.lisp Answers="400/x" Correctness=T
PreTest File=p_one_op_3d.lisp Answers="3x" Correctness=T
<FileName>h_cancer_145000y.lisp</FileName>
<stats cpn="1" nsd="7" ncir="0" mpn="37" msn="17" mlfcs="3" str="verbal" rspl="NIL" >
<Problem_Statement>According to the American Heart Association, more than 145,000 women die every year from smoking-related diseases. In fact, lung cancer has become the leading cause of cancer death among women. For "y" years, write an expression for the minimum number of women who will die.</Problem_Statement>
<Tutor time="[10/12/2001][17:56:42][106]" qtype="QSYMB" goal="y*145000">Hello. Please write an expression for the number of women who will die. </Tutor>
<Student time="[10/12/2001][17:57:26][44]">145,00y</Student>
<Tutor time="[10/12/2001][17:57:26][0]" qtype="QEXPLAIN_VERBAL" goal="y*145000"> Hmm. No. We will come back to the number of women who will die. Let me try to break this down for you. Can you explain how you would find the number of women who will die?</Tutor>
<Student time="[10/12/2001][17:59:53][147]">the number of women who will die is equal to the number of women who die every year times the amount of time.</Student>
<Tutor time="[10/12/2001][17:59:53][0]" qtype="Q_SYMB_AFTER_VERBAL" goal="y*145000">Correct. Now, follow that up by writing an expression for the number of women who will die</Tutor>
<Student time="[10/12/2001][18:0:21][28]">145,000*y</Student>
A stricly higher question was satsified
<Tutor time="[10/12/2001][18:0:21][0]" qtype="NIL" goal="NIL">Correct. A new problem is needed </Tutor>
<problem_done num="1" name="h_cancer_145000y.lisp" num_of_attempts="3">
<FileName>p_one_op_5x.lisp</FileName>
<stats cpn="2" nsd="7" ncir="0" mpn="37" msn="17" mlfcs="3" str="verbal" rspl="NIL" >
<Problem_Statement>You have just been hired by PAT_E_OH Furniture Inc. as an furniture assembler. Your job is to remove the furniture from the shipping containers and put them together. You are being paid a wage of $4 dollars an hour. How much would you earn in "x" hours?</Problem_Statement>
<Tutor time="[10/12/2001][18:0:22][1]" qtype="QSYMB" goal="4*x">Hello. Please write an expression for your earnings. </Tutor>
<Student time="[10/12/2001][18:1:14][52]">4x</Student>
<Tutor time="[10/12/2001][18:1:15][1]" qtype="NIL" goal="NIL">Correct. A new problem is needed </Tutor>
<problem_done num="2" name="p_one_op_5x.lisp" num_of_attempts="1">
<FileName>n_whale2op.lisp</FileName>
<stats cpn="3" nsd="7" ncir="1" mpn="37" msn="17" mlfcs="3" str="verbal" rspl="NIL" >
<Problem_Statement>You are flying in a helicopter over a pack of whales in the ocean. The whale's spout "m" meters into the sky. The helicopter pilot says that if the whale spout doubled its height, we would have gotten wet! Assume the helicopter was flying at a height that was double the whale's spout's height. How high is the helicopter flying?</Problem_Statement>
<Tutor time="[10/12/2001][18:1:15][0]" qtype="QSYMB" goal="2*m">Hello. Please write an expression for the height of the helicopter. </Tutor>
<Student time="[10/12/2001][18:1:57][42]">2m</Student>
<Tutor time="[10/12/2001][18:1:57][0]" qtype="NIL" goal="NIL">Correct. A new problem is needed </Tutor>
<problem_done num="3" name="n_whale2op.lisp" num_of_attempts="1">
<FileName>h_firstcar_x_10.lisp</FileName>
<stats cpn="4" nsd="7" ncir="2" mpn="37" msn="17" mlfcs="3" str="verbal" rspl="NIL" >
<Problem_Statement>The first gas driven car was unveiled in 1885. Its top speed was 10 mph. Suppose this car was "x" miles from New York City and traveling towards New York at its top speed. Write an expression for how much time the drive took.</Problem_Statement>
<Tutor time="[10/12/2001][18:1:58][1]" qtype="QSYMB" goal="x/10">Hello. Please write an expression for the amount of time the drive took. </Tutor>
<Student time="[10/12/2001][18:2:50][52]">x/10</Student>
<Tutor time="[10/12/2001][18:2:50][0]" qtype="NIL" goal="NIL">Correct. A new problem is needed </Tutor>
<problem_done num="4" name="h_firstcar_x_10.lisp" num_of_attempts="1">
mark_as_would_have_graduated_early
------ YOu would have graduated (before posttest)------
<FileName>h_skyscrapers_x-3.lisp</FileName>
<stats cpn="5" nsd="7" ncir="3" mpn="37" msn="17" mlfcs="3" str="verbal" rspl="NIL" >
<Problem_Statement>Two Pittsburgh skyscrapers were built at the same rate. As they rose, they height of the Acme Building way always 3 stories more than the height of the Stilt Tower, since work was started on the Acme Building first. If the Acme Building is "x" stories high, write an expression for the height of the Stilt building.</Problem_Statement>
<Tutor time="[10/12/2001][18:3:5][15]" qtype="QSYMB" goal="x-3">Hello. Please write an expression for the height of the Stilt Building. </Tutor>
<Student time="[10/12/2001][18:3:56][51]">x-3</Student>
<Tutor time="[10/12/2001][18:3:56][0]" qtype="NIL" goal="NIL">Correct. A new problem is needed </Tutor>
<problem_done num="5" name="h_skyscrapers_x-3.lisp" num_of_attempts="1">
-----POST TEST------ adv_to_posttext_normaly_checking_to_set_if_we_comeback_later
</section>
<FileName>p_one_op_3d.lisp</FileName>
<stats cpn="1" nsd="8" ncir="0" mpn="2" msn="17" mlfcs="2" str="verbal" rspl="NIL" >
<Problem_Statement>A pine tree grows 3 inches each day. Write an expression for how much it grows in "x" days.</Problem_Statement>
<Tutor time="[10/12/2001][18:4:3][7]" qtype="QSYMB" goal="3*x">Hello. Please write an expression for the amount it grows. </Tutor>
<Student time="[10/12/2001][18:4:33][30]">3x</Student>
<Tutor time="[10/12/2001][18:4:33][0]" qtype="NIL" goal="NIL">Correct. A new problem is needed </Tutor>
<problem_done num="1" name="p_one_op_3d.lisp" num_of_attempts="1">
<FileName>c_one_op_booths_400_d_x.lisp</FileName>
<stats cpn="2" nsd="8" ncir="1" mpn="2" msn="17" mlfcs="2" str="verbal" rspl="NIL" >
<Problem_Statement>The carnival committee is dividing up the whole field for carnival booths. If there are "x" booths and the area of the field is 400 square yards, write an expression for the area each booth gets.</Problem_Statement>
<Tutor time="[10/12/2001][18:4:33][0]" qtype="QSYMB" goal="400/x">Hello. Please write an expression for the area of each booth. </Tutor>
<Student time="[10/12/2001][18:4:57][24]">400/x</Student>
<Tutor time="[10/12/2001][18:4:57][0]" qtype="NIL" goal="NIL">Correct. A new problem is needed </Tutor>
<problem_done num="2" name="c_one_op_booths_400_d_x.lisp" num_of_attempts="1">
----survey ----
<realy_a_student I really am a student>
<how_hard 4>
<how_hard_debuging current_problem_num=6 masterlevelforcurrentsection=3>
<how_helpful_was_ML =1>
-----after POST TEST- GO ON To New Lesson ------
</section>
PreTest Answers="--sep0--62+(62-x)--sep0----sep1--5h-7--sep1----sep2--500-60*m--sep2--"
PreTest File=midtest_boys_girls.2op_dis Answers="62+(62-x)" Correctness=T
PreTest File=midtest_mcd-7.2op Answers="5h-7" Correctness=T
PreTest File=midtest_ann_analogue.2op Answers="500-60*m" Correctness=T
<FileName>h_party_3x+6.lisp</FileName>
<stats cpn="1" nsd="9" ncir="0" mpn="46" msn="17" mlfcs="3" str="verbal" rspl="NIL" >
<Problem_Statement>Dr. Anderson and his wife are having a party for their sons, Jay and Abe. Jay and Abe want to have hamburgers to eat the party. Based on past experience, the Andersons estimate that each of Jay and Abe's friends will eat 3 hamburgers, Jay will eat 4 hamburgers, and Abe will eat 2. If they invite "x" friends, write an expression for how many hamburgers they will need.</Problem_Statement>
<Tutor time="[10/12/2001][18:7:50][173]" qtype="QSYMB" goal="3*x+6">Hello. Please write an expression for the number of hamburgers. </Tutor>
<Student time="[10/12/2001][18:8:46][56]">3x+6</Student>
<Tutor time="[10/12/2001][18:8:46][0]" qtype="NIL" goal="NIL">Correct. A new problem is needed </Tutor>
<problem_done num="1" name="h_party_3x+6.lisp" num_of_attempts="1">
<FileName>h_film_7x-15.lisp</FileName>
<stats cpn="2" nsd="9" ncir="1" mpn="46" msn="17" mlfcs="3" str="verbal" rspl="NIL" >
<Problem_Statement>Lee recently won first prize in his school's photography competition. Along with a plaque, he received a $15 gift certificate for the local photo shop. Lee is happy for his good fortune, for he was planning to go to the store to buy rolls of film for his upcoming trip to the Grand Canyon. The brand of film Lee uses costs $7 for each roll, but with the prize, he won't have to spend as much money. If Lee buys "x" rolls of film, write an expression for the amount of money he spends.</Problem_Statement>
<Tutor time="[10/12/2001][18:8:46][0]" qtype="QSYMB" goal="7*x-15">Hello. Please write an expression for the total amount of money Lee spent. </Tutor>
<Student time="[10/12/2001][18:9:59][73]">7x-15</Student>
<Tutor time="[10/12/2001][18:9:59][0]" qtype="NIL" goal="NIL">Correct. A new problem is needed </Tutor>
<problem_done num="2" name="h_film_7x-15.lisp" num_of_attempts="1">
<FileName>pat_subscrips_5x-100.2op.lisp</FileName>
<stats cpn="3" nsd="9" ncir="2" mpn="46" msn="17" mlfcs="3" str="verbal" rspl="NIL" >
<Problem_Statement>A person works on a commission basis, selling magazine subscriptions. For each subscription he sells, he earns 5 dollars. To become a representative of the company he first had to pay the company a fee of 100 dollars to take their training course. His profit is the amount of money he gets from the subscriptions he sells minus the fee that he paid for the training course. Write an expression for his profit if he sells "m" magazine subscriptions.</Problem_Statement>
<Tutor time="[10/12/2001][18:9:59][0]" qtype="QSYMB" goal="5m-100">Hello. Please write an expression for the total profit. </Tutor>
<Student time="[10/12/2001][18:10:48][49]">5m-100</Student>
<Tutor time="[10/12/2001][18:10:48][0]" qtype="NIL" goal="NIL">Correct. A new problem is needed </Tutor>
<problem_done num="3" name="pat_subscrips_5x-100.2op.lisp" num_of_attempts="1">
mark_as_would_have_graduated_early
------ YOu would have graduated (before posttest)------
<FileName>p_waiterTips.2op.lisp</FileName>
<stats cpn="4" nsd="9" ncir="3" mpn="46" msn="17" mlfcs="3" str="verbal" rspl="NIL" >
<Problem_Statement>Michael works as a waiter. Saturday he worked "h" hours. The restaurant pays him an hourly wage of $5 an hour. He also made $40 dollars in tips. Write an expression for the total amount he earned Saturday Night. </Problem_Statement>
<Tutor time="[10/12/2001][18:10:56][8]" qtype="QSYMB" goal="40+5*h">Hello. Please write an expression for the total amount Michael earned. </Tutor>
<Student time="[10/12/2001][18:11:45][49]">5h+40</Student>
<Tutor time="[10/12/2001][18:11:45][0]" qtype="NIL" goal="NIL">Correct. A new problem is needed </Tutor>
<problem_done num="4" name="p_waiterTips.2op.lisp" num_of_attempts="1">
<FileName>h_magazine_5x-100.lisp</FileName>
<stats cpn="5" nsd="9" ncir="4" mpn="46" msn="17" mlfcs="3" str="verbal" rspl="NIL" >
<Problem_Statement>A person works on a commission basis, selling magazine subscriptions. For each subscription he sells, he earns $5. To become a representative of the company, he first had to pay the company a fee of $100 to take their training course. His profit is the amount of money he gets from the subscriptions he sells minus the fee that he paid for the training course. If a person sells "s" subscriptions, write an expression for how much profit he will make.</Problem_Statement>
<Tutor time="[10/12/2001][18:11:45][0]" qtype="QSYMB" goal="5*s-100">Hello. Please write an expression for the total profit. </Tutor>
<Student time="[10/12/2001][18:12:25][40]">5s-100</Student>
<Tutor time="[10/12/2001][18:12:25][0]" qtype="NIL" goal="NIL">Correct. A new problem is needed </Tutor>
<problem_done num="5" name="h_magazine_5x-100.lisp" num_of_attempts="1">
<FileName>h_tire_32-2x.lisp</FileName>
<stats cpn="6" nsd="9" ncir="5" mpn="46" msn="17" mlfcs="3" str="verbal" rspl="NIL" >
<Problem_Statement>Alberto filled his right rear tire with air at the gas station around the block from where he lives. The tire pressure decreases at the rate of 2 psi (pounds per square inch) a day. His tire starts with 32 psi. Write an expression for the amount of tire pressure after "x" days.</Problem_Statement>
<Tutor time="[10/12/2001][18:12:25][0]" qtype="QSYMB" goal="32-2*x">Hello. Please write an expression for the new amount of tire pressure. </Tutor>
<Student time="[10/12/2001][18:13:35][70]">32-2x</Student>
<Tutor time="[10/12/2001][18:13:35][0]" qtype="NIL" goal="NIL">Correct. A new problem is needed </Tutor>
<problem_done num="6" name="h_tire_32-2x.lisp" num_of_attempts="1">
<FileName>h_shovel_8w-x.lisp</FileName>
<stats cpn="7" nsd="9" ncir="6" mpn="46" msn="17" mlfcs="3" str="verbal" rspl="NIL" >
<Problem_Statement>You have a plan to make some money shovelling snow after the big snow storm. You go to the local hardware store and buy two shovels, an ice scraper, and a large bucket of salt. Your total cost for these items is "x" dollars. You plan on charging people $8 for each walk that you shovel. If you shovel "w" walks, write an expression for your profit.</Problem_Statement>
<Tutor time="[10/12/2001][18:13:35][0]" qtype="QSYMB" goal="8*w-x">Hello. Please write an expression for the final profit. </Tutor>
<Student time="[10/12/2001][18:14:27][52]">8w-x</Student>
<Tutor time="[10/12/2001][18:14:27][0]" qtype="NIL" goal="NIL">Correct. A new problem is needed </Tutor>
<problem_done num="7" name="h_shovel_8w-x.lisp" num_of_attempts="1">
<FileName>h_snowcones_1s-50.lisp</FileName>
<stats cpn="8" nsd="9" ncir="7" mpn="46" msn="17" mlfcs="3" str="verbal" rspl="NIL" >
<Problem_Statement>A friend offers you a job selling snow cones. Since he owns the snow cone maker, he will let you use it for $50. You will make $1 on each snow cone you sell. The amount you get from selling the snow cones, minus $50, is your profit. Write an expression that will show your total profit if you sell "s" snowcones.</Problem_Statement>
<Tutor time="[10/12/2001][18:14:28][1]" qtype="QSYMB" goal="1*s-50">Hello. Please write an expression for your total profit. </Tutor>
<Student time="[10/12/2001][18:15:26][58]">s-50</Student>
<Tutor time="[10/12/2001][18:15:26][0]" qtype="NIL" goal="NIL">Correct. A new problem is needed </Tutor>
<problem_done num="8" name="h_snowcones_1s-50.lisp" num_of_attempts="1">
<FileName>h_license_35+40t.lisp</FileName>
<stats cpn="9" nsd="9" ncir="8" mpn="46" msn="17" mlfcs="3" str="verbal" rspl="NIL" >
<Problem_Statement>To get a driver's license most states require that you pass both a written test and a road test. In one state, you would pay a fee of $35 to take the written test and another $40 to take the road test. If you fail the road test, you must pay the road test fee again to retake it. Write an expression for the cost of getting your drivers license if you have to take the road test "t" times before you pass.</Problem_Statement>
<Tutor time="[10/12/2001][18:15:27][1]" qtype="QSYMB" goal="35+40*t">Hello. Please write an expression for the total cost to get your driver's license. </Tutor>
<Student time="[10/12/2001][18:16:34][67]">35+40t</Student>
<Tutor time="[10/12/2001][18:16:34][0]" qtype="NIL" goal="NIL">Correct. A new problem is needed </Tutor>
<problem_done num="9" name="h_license_35+40t.lisp" num_of_attempts="1">
<FileName>pat_30-2d.lisp</FileName>
<stats cpn="10" nsd="9" ncir="9" mpn="46" msn="17" mlfcs="3" str="verbal" rspl="NIL" >
<Problem_Statement>Workers at an oil refinery have to check the depth of the oil storage tank to see if any is leaking out. They find that the depth of the oil is currently 30 meters, and that oil is being lost at a rate of 2 meters per day. They come back to check on the oil level after "x" days. Write an expression for the new oil level if the rate of loss remains constant.</Problem_Statement>
<Tutor time="[10/12/2001][18:16:34][0]" qtype="QSYMB" goal="30-2*x">Hello. Please write an expression for the new oil level. </Tutor>
<Student time="[10/12/2001][18:19:11][157]">30-2x</Student>
<Tutor time="[10/12/2001][18:19:11][0]" qtype="NIL" goal="NIL">Correct. A new problem is needed </Tutor>
<problem_done num="10" name="pat_30-2d.lisp" num_of_attempts="1">
-----POST TEST------ adv_to_posttext_normaly_checking_to_set_if_we_comeback_later
</section>
<FileName>midtest_ann_analogue.2op</FileName>
<stats cpn="1" nsd="10" ncir="0" mpn="3" msn="17" mlfcs="3" str="verbal" rspl="NIL" >
<Problem_Statement>Shiquita was ridding her bike home from school and stopped to talk to a friend after ridding for "m" minutes. Her friend asked "How far is your house from here?" Shiquita knew that the total distance between home and school was 500 yards and that she biked at 60 yards per minute. How many more yards does she have to bike to get home?</Problem_Statement>
<Tutor time="[10/12/2001][18:19:20][9]" qtype="QSYMB" goal="500-60*m">Hello. Please write an expression for the distance she has left to bike home. </Tutor>
<Student time="[10/12/2001][18:20:8][48]">500-60*m</Student>
<Tutor time="[10/12/2001][18:20:8][0]" qtype="NIL" goal="NIL">Correct. A new problem is needed </Tutor>
<problem_done num="1" name="midtest_ann_analogue.2op" num_of_attempts="1">
<FileName>midtest_mcd-7.2op</FileName>
<stats cpn="2" nsd="10" ncir="1" mpn="3" msn="17" mlfcs="3" str="verbal" rspl="NIL" >
<Problem_Statement>Mike starts a job at McDonald's that will pay him 5 dollars an hour. Mike gets dropped off by his parents at the start of his shift but he takes a 10 minute taxi ride home that costs him 7 dollars. Mike works a "h" hour shift. After taking into account his taxi ride, write an expression for how much he makes in one night?</Problem_Statement>
<Tutor time="[10/12/2001][18:20:9][1]" qtype="QSYMB" goal="5*h-7">Hello. Please write an expression for the amount of money he comes home with. </Tutor>
<Student time="[10/12/2001][18:20:51][42]">5h-7</Student>
<Tutor time="[10/12/2001][18:20:51][0]" qtype="NIL" goal="NIL">Correct. A new problem is needed </Tutor>
<problem_done num="2" name="midtest_mcd-7.2op" num_of_attempts="1">
<FileName>midtest_boys_girls.2op_dis</FileName>
<stats cpn="3" nsd="10" ncir="2" mpn="3" msn="17" mlfcs="3" str="verbal" rspl="NIL" >
<Problem_Statement>Ms. Lindquist, a math teacher, teaches 5 classes. She teaches 62 girls. She teaches "x" fewer boys than girls. Write an expression for how many students Ms. Lindquist teaches.</Problem_Statement>
<Tutor time="[10/12/2001][18:20:51][0]" qtype="QSYMB" goal="62+(62-x)">Hello. Please write an expression for the number of students she teaches. </Tutor>
<Student time="[10/12/2001][18:21:36][45]">62+(62-x)</Student>
<Tutor time="[10/12/2001][18:21:36][0]" qtype="NIL" goal="NIL">Correct. A new problem is needed </Tutor>
<problem_done num="3" name="midtest_boys_girls.2op_dis" num_of_attempts="1">
----survey ----
<realy_a_student I really am a student>
<how_hard 4>
<how_hard_debuging current_problem_num=11 masterlevelforcurrentsection=3>
<how_helpful_was_ML =1>
-----after POST TEST- GO ON To New Lesson ------
</section>
PreTest Answers="--sep0--200/s--sep0----sep1--55x--sep1--"
PreTest File=midtest_tiger_dis_div_s.1op Answers="200/s" Correctness=T
PreTest File=midtest_dis_div_r.1op Answers="55x" Correctness=NIL
<FileName>c_one_op_d_eq_rt_d_45x</FileName>
<stats cpn="1" nsd="11" ncir="0" mpn="12" msn="17" mlfcs="3" str="is" rspl="NIL" >
<Problem_Statement>If you swim for 45 minutes at "x" feet per minute write an expression for how many feet you swam. </Problem_Statement>
<Tutor time="[10/12/2001][18:23:4][88]" qtype="QSYMB" goal="45*x">Hello. Please write an expression for the number of feet you swam. </Tutor>
<Student time="[10/12/2001][18:23:48][44]">45x</Student>
<Tutor time="[10/12/2001][18:23:48][0]" qtype="NIL" goal="NIL">Correct. A new problem is needed </Tutor>
<problem_done num="1" name="c_one_op_d_eq_rt_d_45x" num_of_attempts="1">
<FileName>p_one_op_d_eq_rt_s_100_d_x.lisp</FileName>
<stats cpn="2" nsd="11" ncir="1" mpn="12" msn="17" mlfcs="3" str="is" rspl="NIL" >
<Problem_Statement>You drive for "x" hour a distance of 100 miles. Write an expression for how fast you drove.</Problem_Statement>
<Tutor time="[10/12/2001][18:23:48][0]" qtype="QSYMB" goal="100/x">Hello. Please write an expression for the speed you drove. </Tutor>
<Student time="[10/12/2001][18:24:40][52]">100/x</Student>
<Tutor time="[10/12/2001][18:24:40][0]" qtype="NIL" goal="NIL">Correct. A new problem is needed </Tutor>
<problem_done num="2" name="p_one_op_d_eq_rt_s_100_d_x.lisp" num_of_attempts="1">
<FileName>p_one_op_d_eq_rt_t_x_d_60.lisp</FileName>
<stats cpn="3" nsd="11" ncir="2" mpn="12" msn="17" mlfcs="3" str="is" rspl="NIL" >
<Problem_Statement>Doug was driving from Boston to Washington, a distance of "x" miles. He drove at 60 miles per hour. Write an expression for how much time the drive took.</Problem_Statement>
<Tutor time="[10/12/2001][18:24:40][0]" qtype="QSYMB" goal="x/60">Hello. Please write an expression for the amount of time the drive took. </Tutor>
<Student time="[10/12/2001][18:25:41][61]">x/60</Student>
<Tutor time="[10/12/2001][18:25:42][1]" qtype="NIL" goal="NIL">Correct. A new problem is needed </Tutor>
<problem_done num="3" name="p_one_op_d_eq_rt_t_x_d_60.lisp" num_of_attempts="1">
mark_as_would_have_graduated_early
------ YOu would have graduated (before posttest)------
<FileName>p_one_op_d_eq_rt_d_sh</FileName>
<stats cpn="4" nsd="11" ncir="3" mpn="12" msn="17" mlfcs="3" str="is" rspl="NIL" >
<Problem_Statement>Joan is driving on the Autobahn in Germany which has no speed limit. She drove at a speed of "s" miles per hour for "h" hours. Write an expression for the distance driven.</Problem_Statement>
<Tutor time="[10/12/2001][18:25:52][10]" qtype="QSYMB" goal="s*h">Hello. Please write an expression for the distance driven. </Tutor>
<Student time="[10/12/2001][18:26:59][67]">sh</Student>
<Tutor time="[10/12/2001][18:26:59][0]" qtype="NIL" goal="NIL">Correct. A new problem is needed </Tutor>
<problem_done num="4" name="p_one_op_d_eq_rt_d_sh" num_of_attempts="1">
<FileName>p_one_op_d_eq_rt_d_20h</FileName>
<stats cpn="5" nsd="11" ncir="4" mpn="12" msn="17" mlfcs="3" str="is" rspl="NIL" >
<Problem_Statement>You ride your bike at a speed of 20 miles per hour of "h" hours. Write an expression for the distance ridden. </Problem_Statement>
<Tutor time="[10/12/2001][18:26:59][0]" qtype="QSYMB" goal="20*h">Hello. Please write an expression for the distance biked. </Tutor>
<Student time="[10/12/2001][18:27:44][45]">20h</Student>
<Tutor time="[10/12/2001][18:27:44][0]" qtype="NIL" goal="NIL">Correct. A new problem is needed </Tutor>
<problem_done num="5" name="p_one_op_d_eq_rt_d_20h" num_of_attempts="1">
<FileName>c_one_op_d_eq_rt_s_y_d_z.lisp</FileName>
<stats cpn="6" nsd="11" ncir="5" mpn="12" msn="17" mlfcs="3" str="is" rspl="NIL" >
<Problem_Statement>Min Jung and her friend Lisa went on a bike ride. They rode from Lisa's house to the library which is "y" miles and it took them "z" hours. Write an expression for their average speed.</Problem_Statement>
<Tutor time="[10/12/2001][18:27:45][1]" qtype="QSYMB" goal="y/z">Hello. Please write an expression for the speed average bike speed. </Tutor>
<Unexpected begin>
Quit with --myconfirmedquit--
<Unexpected end>
Student Restarted and appending beginning
Begun
<FileName>c_one_op_d_eq_rt_s_y_d_z.lisp</FileName>
<stats cpn="6" nsd="11" ncir="5" mpn="12" msn="17" mlfcs="3" str="is" rspl="NIL" >
<Problem_Statement>Min Jung and her friend Lisa went on a bike ride. They rode from Lisa's house to the library which is "y" miles and it took them "z" hours. Write an expression for their average speed.</Problem_Statement>
<Tutor time="[10/18/2001][14:3:5][1]" qtype="QSYMB" goal="y/z">Hello. Please write an expression for the speed average bike speed. </Tutor>
<Student time="[10/18/2001][14:4:18][73]">yz</Student>
<Tutor time="[10/18/2001][14:4:18][0]" qtype="QCOMPUTE" goal="10"> No. We will come back to the speed average bike speed. Let me try to break this down for you. Please compute the speed average bike speed if the amount of time the trip took was "2" hours, and "the distance to the library" was "20" miles? </Tutor>
<Student time="[10/18/2001][14:5:0][42]">20/2</Student>
A stricly higher question was satsified
<Tutor time="[10/18/2001][14:5:0][0]" qtype="QGENERLIZE" goal="y/z">Correct. Now, say that again but this time use the varaibles from the problem. </Tutor>
<Student time="[10/18/2001][14:5:8][8]">y/z</Student>
<Tutor time="[10/18/2001][14:5:8][0]" qtype="NIL" goal="NIL">Correct. A new problem is needed </Tutor>
<problem_done num="6" name="c_one_op_d_eq_rt_s_y_d_z.lisp" num_of_attempts="3">
-----POST TEST------ adv_to_posttext_normaly_checking_to_set_if_we_comeback_later
</section>
<FileName>midtest_dis_div_r.1op</FileName>
<stats cpn="1" nsd="12" ncir="0" mpn="2" msn="17" mlfcs="2" str="is" rspl="NIL" >
<Problem_Statement>Rose Mary needed to drive at 55 miles per hour to Houston, Texas that was "x" miles away. How long is the ride going to take her?</Problem_Statement>
<Tutor time="[10/18/2001][14:5:14][6]" qtype="QSYMB" goal="x/55">Hello. Please write an expression for the time it will take her. </Tutor>
<Student time="[10/18/2001][14:5:55][41]">55/x</Student>
<Tutor time="[10/18/2001][14:5:55][0]" qtype="QCOMPUTE" goal="3"> No. We will come back to the time it will take her. Let me try to break this down for you. Please compute the time it will take her if the distance was 165 miles? </Tutor>
<Student time="[10/18/2001][14:6:11][16]">165/55</Student>
A stricly higher question was satsified
<Tutor time="[10/18/2001][14:6:11][0]" qtype="QGENERLIZE" goal="x/55">Correct. Now use "x" instead of 165 to again express the time it will take her.</Tutor>
<Student time="[10/18/2001][14:6:22][11]">x/55</Student>
<Tutor time="[10/18/2001][14:6:22][0]" qtype="NIL" goal="NIL">Correct. A new problem is needed </Tutor>
<problem_done num="1" name="midtest_dis_div_r.1op" num_of_attempts="3">
<FileName>midtest_tiger_dis_div_s.1op</FileName>
<stats cpn="2" nsd="12" ncir="0" mpn="2" msn="17" mlfcs="2" str="is" rspl="NIL" >
<Problem_Statement>Tiger Woods was on the golf driving range practicing his golf shots. He noticed that it took his golf ball "s" seconds to hit a sign that said it was "200" yards away. He wondered how fast the ball was going. Write an expression for the average speed of the golf ball.</Problem_Statement>
<Tutor time="[10/18/2001][14:6:22][0]" qtype="QSYMB" goal="200/s">Hello. Please write an expression for the average speed of the golf ball. </Tutor>
<Student time="[10/18/2001][14:6:50][28]">200/s</Student>
<Tutor time="[10/18/2001][14:6:50][0]" qtype="NIL" goal="NIL">Correct. A new problem is needed </Tutor>
<problem_done num="2" name="midtest_tiger_dis_div_s.1op" num_of_attempts="1">
----survey ----
<realy_a_student I really am a student>
<how_hard 8>
<how_hard_debuging current_problem_num=7 masterlevelforcurrentsection=3>
<how_helpful_was_ML =1>
-----after POST TEST- GO ON To New Lesson ------
</section>
PreTest Answers="--sep0--5w-15--sep0----sep1--550/h-2--sep1----sep2--(972+p)/5--sep2--"
PreTest File=posttest_lemondae.like2op Answers="5w-15" Correctness=T
PreTest File=post_dfa5_savedtime.2opdis Answers="550/h-2" Correctness=NIL
PreTest File=post_combine_divide.2opdis Answers="(972+p)/5" Correctness=T
<FileName>n_how_much_faster2op.lisp</FileName>
<stats cpn="1" nsd="13" ncir="0" mpn="13" msn="17" mlfcs="3" str="is" rspl="NIL" >
<Problem_Statement>Today you drove to Grandma's house that is "k" kilometers from your house. Normally it takes you "t" hours. This time it did not take as long and you averaged a speed of 90 kilometers per hour. How much faster than your normal speed did you drive this time.</Problem_Statement>
<Tutor time="[10/18/2001][14:9:11][141]" qtype="QSYMB" goal="90-k/t">Hello. Please write an expression for how much faster was your speed today. </Tutor>
<Student time="[10/18/2001][14:10:47][96]">k/t-90</Student>
<Tutor time="[10/18/2001][14:10:48][1]" qtype="QCOMPUTE" goal="10"> No. But, "k/t" is correct for your previous driving speed. We will come back to how much faster was your speed today. Let me try to break this down for you. Please compute how much faster was your speed today if the hours it normally takes was "3" hours, and "the distance to Grandma's house" was "240" kilometers? </Tutor>
<Student time="[10/18/2001][14:11:15][27]">240/3</Student>
<Tutor time="[10/18/2001][14:11:15][0]" qtype="QCOMPUTE" goal="240/3"> Hmm. No. Let me ask you a different question. Please compute your previous driving speed if the hours it normally takes was "3" hours, and "the distance to Grandma's house" was "240" kilometers? </Tutor>
<Student time="[10/18/2001][14:12:37][82]">240/3</Student>
<Tutor time="[10/18/2001][14:12:37][0]" qtype="QCOMPUTE" goal="10">Correct. Now, lets try this question again: Please compute how much faster was your speed today if the hours it normally takes was "3" hours, and "the distance to Grandma's house" was "240" kilometers? </Tutor>
<Student time="[10/18/2001][14:13:58][81]">240/3-t</Student>
<Tutor time="[10/18/2001][14:13:59][1]" qtype="QCOMPUTE" goal="10">It looks like you didn't understand what I was asking you. For this question, you should not use variables: For instance, use 3 here instead of "t". Try this question again:Please compute how much faster was your speed today if the hours it normally takes was "3" hours, and "the distance to Grandma's house" was "240" kilometers? </Tutor>
<Student time="[10/18/2001][14:14:42][43]">240/3</Student>
<Tutor time="[10/18/2001][14:14:42][0]" qtype="QCOMPUTE" goal="10"> Hmm. No. Try again please. If the hours it normally takes was "3" hours instead of "t", and the distance to Grandma's house was "240" kilometers instead of "k" what would how much faster was your speed today be?</Tutor>
<Student time="[10/18/2001][14:15:32][50]">240*3</Student>
<Tutor time="[10/18/2001][14:15:32][0]" qtype="QCOMPUTE" goal="10"> Hmm. No. Try again please. Please compute how much faster was your speed today if the hours it normally takes was "3" hours, and "the distance to Grandma's house" was "240" kilometers? Hint: Use the fact that your average speed is 90 kilometers per hour and your previous driving speed is 240/3=80 kilometers per hour. </Tutor>
<Student time="[10/18/2001][14:16:17][45]">(240/3)-90</Student>
<Tutor time="[10/18/2001][14:16:17][0]" qtype="QCOMPUTE" goal="10"> Hmm. No. Try please. again Please compute how much faster was your speed today if the hours it normally takes was "3" hours, and "the distance to Grandma's house" was "240" kilometers? Hint: It is one of these 6 choices: "90-80", "80-90", "90+80", "90*80", "90/80", or "80/90".</Tutor>
<Student time="[10/18/2001][14:16:47][30]">90-80</Student>
<Tutor time="[10/18/2001][14:16:48][1]" qtype="QEXPLAIN" goal="90-240/3">Correct. Using only 90, 240, and 3 write an expression for how much faster was your speed today.</Tutor>
<Student time="[10/18/2001][14:17:6][18]">90-(270/3)</Student>
<Tutor time="[10/18/2001][14:17:7][1]" qtype="QEXPLAIN" goal="240/3"> Hmm. No. No. Your answer of "90-(270/3)" equals "0", but you wanted to write an expression that equaled "10". Let me ask you a different question. Using only 240, and 3 write an expression for your previous driving speed.</Tutor>
<Student time="[10/18/2001][14:17:32][25]">90-(240/3)</Student>
A stricly higher question was satsified
<Tutor time="[10/18/2001][14:17:32][0]" qtype="QGENERLIZE" goal="90-k/t">Correct. Now, say that again but this time use the varaibles from the problem. </Tutor>
<Student time="[10/18/2001][14:17:49][17]">90-(k/t)</Student>
<Tutor time="[10/18/2001][14:17:49][0]" qtype="NIL" goal="NIL">Correct. A new problem is needed </Tutor>
<problem_done num="1" name="n_how_much_faster2op.lisp" num_of_attempts="11">
<FileName>p_maryAge_is_albert-(Bob-c).2op</FileName>
<stats cpn="2" nsd="13" ncir="0" mpn="13" msn="17" mlfcs="3" str="is" rspl="NIL" >
<Problem_Statement>Jane is "j" years old. Peg is "p" years old. Mary is Peg's age minus Toms's age. Tom is 3 years younger than Jane. Peg is "x" years older than Mark. Write an expression for Mary's age.</Problem_Statement>
<Tutor time="[10/18/2001][14:17:50][1]" qtype="QSYMB" goal="p-(j-3)">Hello. Please write an expression for Mary's age. </Tutor>
<Student time="[10/18/2001][14:19:55][125]">p-(J-3)</Student>
<Tutor time="[10/18/2001][14:19:55][0]" qtype="NIL" goal="NIL">Correct. A new problem is needed </Tutor>
<problem_done num="2" name="p_maryAge_is_albert-(Bob-c).2op" num_of_attempts="1">
<FileName>p_biketrip_AlgebraSymb.lisp</FileName>
<stats cpn="3" nsd="13" ncir="1" mpn="13" msn="17" mlfcs="3" str="is" rspl="NIL" >
<Problem_Statement>You go on a bike ride. You ride at a speed of "s" miles per hour. You bike "m" miles. You take a "h" hour break. Write an expression for how long the trip took. </Problem_Statement>
<Tutor time="[10/18/2001][14:19:56][1]" qtype="QSYMB" goal="h+m/s">Hello. Please write an expression for the total time the trip took. </Tutor>
<Student time="[10/18/2001][14:20:55][59]">m/s+h</Student>
<Tutor time="[10/18/2001][14:20:55][0]" qtype="NIL" goal="NIL">Correct. A new problem is needed </Tutor>
<problem_done num="3" name="p_biketrip_AlgebraSymb.lisp" num_of_attempts="1">
<FileName>p_hourssaved(x-b)divSpd.like</FileName>
<stats cpn="4" nsd="13" ncir="2" mpn="13" msn="17" mlfcs="3" str="is" rspl="NIL" >
<Problem_Statement>Linda is training for a marathon. A marathon is a race that is about 26 miles long. Her normal time is 208 minutes, but in the Boston Marathon she was "x" minutes slower than her usual time. What was her running speed in miles per minute?</Problem_Statement>
<Tutor time="[10/18/2001][14:20:55][0]" qtype="QSYMB" goal="26/(208+x)">Hello. Please write an expression for her average speed. </Tutor>
<Student time="[10/18/2001][14:22:41][106]">26/(208-x)</Student>
<Tutor time="[10/18/2001][14:22:42][1]" qtype="QCOMPUTE" goal="260"> No. We will come back to her average speed. Let me try to break this down for you. Please compute the number of minutes of the Boston Marathon if the extra number of minutes slower than usual was 52 minutes? </Tutor>
<Student time="[10/18/2001][14:23:16][34]">208+52</Student>
A stricly higher question was satsified
<Tutor time="[10/18/2001][14:23:16][0]" qtype="QGENERLIZE" goal="208+x">Correct. Now use "x" instead of 52 to again express the number of minutes of the Boston Marathon.</Tutor>
<Student time="[10/18/2001][14:23:34][18]">26/(208+x)</Student>
A stricly higher question was satsified
<Tutor time="[10/18/2001][14:23:34][0]" qtype="NIL" goal="NIL">Correct. A new problem is needed </Tutor>
<problem_done num="4" name="p_hourssaved(x-b)divSpd.like" num_of_attempts="3">
<FileName>p_maryAge_is_albert-(Bob-c).lik</FileName>
<stats cpn="5" nsd="13" ncir="0" mpn="13" msn="17" mlfcs="3" str="is" rspl="NIL" >
<Problem_Statement>Paul's age is equal to the difference between his father's age and his sister's age. His father is 3 years younger than his mother. His sister's age is "s." His mother's age is "m." Write an expression for Paul's age.</Problem_Statement>
<Tutor time="[10/18/2001][14:23:35][1]" qtype="QSYMB" goal="(m-3)-s">Hello. Please write an expression for Paul's age. </Tutor>
<Student time="[10/18/2001][14:24:35][60]">(m-3)-s</Student>
<Tutor time="[10/18/2001][14:24:35][0]" qtype="NIL" goal="NIL">Correct. A new problem is needed </Tutor>
<problem_done num="5" name="p_maryAge_is_albert-(Bob-c).lik" num_of_attempts="1">
-----POST TEST------ adv_to_posttext_normaly_checking_to_set_if_we_comeback_later
</section>
<FileName>post_combine_divide.2opdis</FileName>
<stats cpn="1" nsd="14" ncir="0" mpn="3" msn="17" mlfcs="3" str="is" rspl="NIL" >
<Problem_Statement>John and his wife Peg have been saving for 7 months to give the 5 children presents for the holidays. John has saved 972 dollars for presents and Peg has saved "p" dollars. They give each child the same amount. Write an expression for how much each child gets.</Problem_Statement>
<Tutor time="[10/18/2001][14:24:46][11]" qtype="QSYMB" goal="(972+p)/5">Hello. Please write an expression for the amount each child gets. </Tutor>
<Student time="[10/18/2001][14:25:29][43]">(972+p)/5</Student>
<Tutor time="[10/18/2001][14:25:29][0]" qtype="NIL" goal="NIL">Correct. A new problem is needed </Tutor>
<problem_done num="1" name="post_combine_divide.2opdis" num_of_attempts="1">
<FileName>post_dfa5_savedtime.2opdis</FileName>
<stats cpn="2" nsd="14" ncir="1" mpn="3" msn="17" mlfcs="3" str="is" rspl="NIL" >
<Problem_Statement>Bob left at 3 P.M. and drove 550 miles from Boston to Pittsburgh to visit his grandmother. Normally this trip takes him "h" hours, but on Tuesday there was little traffic and he saved 2 hours. What was his average driving speed?</Problem_Statement>
<Tutor time="[10/18/2001][14:25:29][0]" qtype="QSYMB" goal="550/(h-2)">Hello. Please write an expression for his average driving speed. </Tutor>
<Student time="[10/18/2001][14:26:14][45]">550/(h-2)</Student>
<Tutor time="[10/18/2001][14:26:14][0]" qtype="NIL" goal="NIL">Correct. A new problem is needed </Tutor>
<problem_done num="2" name="post_dfa5_savedtime.2opdis" num_of_attempts="1">
<FileName>posttest_lemondae.like2op</FileName>
<stats cpn="3" nsd="14" ncir="2" mpn="3" msn="17" mlfcs="3" str="is" rspl="NIL" >
<Problem_Statement>Mary starts a car washing business. She spends 15 dollars on supplies. She charges 5 dollar per car. On her first day of business she washes "w" cars. How much profit has she made?</Problem_Statement>
<Tutor time="[10/18/2001][14:26:15][1]" qtype="QSYMB" goal="5*w-15">Hello. Please write an expression for the profit she makes. </Tutor>
<Student time="[10/18/2001][14:26:48][33]">5w-15</Student>
<Tutor time="[10/18/2001][14:26:48][0]" qtype="NIL" goal="NIL">Correct. A new problem is needed </Tutor>
<problem_done num="3" name="posttest_lemondae.like2op" num_of_attempts="1">
-----after POST TEST- Back to Lesson(by choice)------
<FileName>n_lotterydivdiv.2op.lisp</FileName>
<stats cpn="6" nsd="13" ncir="1" mpn="13" msn="17" mlfcs="3" str="is" rspl="NIL" >
<Problem_Statement>Kisha's class was having a raffle. They sold "x" dollars worth of tickets. The prize for the raffle was half the money they collected. They decided to divide that amount evenly among four lucky winners. How much money does each winner get?</Problem_Statement>
<Tutor time="[10/18/2001][14:27:9][21]" qtype="QSYMB" goal="(x/2)/4">Hello. Please write an expression for the amount each winner gets. </Tutor>
<Student time="[10/18/2001][14:28:1][52]">(x/2)/4</Student>
<Tutor time="[10/18/2001][14:28:1][0]" qtype="NIL" goal="NIL">Correct. A new problem is needed </Tutor>
<problem_done num="6" name="n_lotterydivdiv.2op.lisp" num_of_attempts="1">
<FileName>c_paint_y+3y.2op.lisp</FileName>
<stats cpn="7" nsd="13" ncir="2" mpn="13" msn="17" mlfcs="3" str="is" rspl="NIL" >
<Problem_Statement>You are mixing paint. You start with "y" liters of yellow paint and then you must add 3 times as much red as you did yellow. Write an expression for the amount of paint you used.</Problem_Statement>
<Tutor time="[10/18/2001][14:28:2][1]" qtype="QSYMB" goal="y+3*y">Hello. Please write an expression for the total amount of paint you used. </Tutor>
<Student time="[10/18/2001][14:29:8][66]">3y</Student>
<Tutor time="[10/18/2001][14:29:8][0]" qtype="QREPRESENT" goal="the amount of red paint you used"> No. That is part of the answer. Tell me this about your answer. What does 3*y represent in words?</Tutor>
<Student time="[10/18/2001][14:29:36][28]">the amount of red paint you used</Student>
<Tutor time="[10/18/2001][14:29:36][0]" qtype="QSYMB" goal="y+3*y">Correct. Now, lets try this question again: Please write an expression for the total amount of paint you used. </Tutor>
<Student time="[10/18/2001][14:29:48][12]">3y+y</Student>
<Tutor time="[10/18/2001][14:29:48][0]" qtype="NIL" goal="NIL">Correct. A new problem is needed </Tutor>
<problem_done num="7" name="c_paint_y+3y.2op.lisp" num_of_attempts="3">
<FileName>n_dropped_speed2op.lisp</FileName>
<stats cpn="8" nsd="13" ncir="0" mpn="13" msn="17" mlfcs="3" str="is" rspl="NIL" >
<Problem_Statement>You drove "k" kilometers on the freeway for "h" hours. You then had to drop your speed by 5 kilometers an hour due to an area with construction. Write an expression for you speed now.</Problem_Statement>
<Tutor time="[10/18/2001][14:29:48][0]" qtype="QSYMB" goal="k/h-5">Hello. Please write an expression for your speed now. </Tutor>
<Student time="[10/18/2001][14:30:55][67]">(k-5)/h</Student>
<Tutor time="[10/18/2001][14:30:55][0]" qtype="QCOMPUTE" goal="95"> Hmm. No. We will come back to your speed now. Let me try to break this down for you. Please compute your speed now if the hours you drove before hitting traffic was "3" hours, and "the distance you drove before hitting traffic" was "300" kilometers? </Tutor>
<Student time="[10/18/2001][14:31:32][37]">300/3</Student>
<Tutor time="[10/18/2001][14:31:32][0]" qtype="QCOMPUTE" goal="300/3"> Hmm. No. Let me ask you a different question. Please compute your previous driving speed if the hours you drove before hitting traffic was "3" hours, and "the distance you drove before hitting traffic" was "300" kilometers? </Tutor>
<Student time="[10/18/2001][14:32:3][31]">300/3</Student>
<Tutor time="[10/18/2001][14:32:3][0]" qtype="QCOMPUTE" goal="95">Correct. Now, lets try this question again: Please compute your speed now if the hours you drove before hitting traffic was "3" hours, and "the distance you drove before hitting traffic" was "300" kilometers? </Tutor>
<Student time="[10/18/2001][14:32:35][32]">300+5/3</Student>
<Tutor time="[10/18/2001][14:32:35][0]" qtype="QCOMPUTE" goal="95"> Hmm. No. Try again please. If the hours you drove before hitting traffic was "3" hours instead of "h", and the distance you drove before hitting traffic was "300" kilometers instead of "k" what would your speed now be?</Tutor>
<Student time="[10/18/2001][14:33:9][34]">300/3</Student>
<Tutor time="[10/18/2001][14:33:9][0]" qtype="QCOMPUTE" goal="95"> Hmm. No. Try again please. Please compute your speed now if the hours you drove before hitting traffic was "3" hours, and "the distance you drove before hitting traffic" was "300" kilometers? Hint: Use the fact that your previous driving speed is 300/3=100 kilometers per hour and the amount you had to slow down due to traffic is 5 kilometers per hour. </Tutor>
<Student time="[10/18/2001][14:34:0][51]">100-5</Student>
<Tutor time="[10/18/2001][14:34:0][0]" qtype="QEXPLAIN" goal="300/3-5">Correct. Using only 300, 3, and 5 write an expression for your speed now.</Tutor>
<Student time="[10/18/2001][14:34:13][13]">300/3-5</Student>
<Tutor time="[10/18/2001][14:34:13][0]" qtype="QGENERLIZE" goal="k/h-5">Correct. Now, say that again but this time use the varaibles from the problem. </Tutor>
<Student time="[10/18/2001][14:34:26][13]">k/h-5</Student>
<Tutor time="[10/18/2001][14:34:26][0]" qtype="NIL" goal="NIL">Correct. A new problem is needed </Tutor>
<problem_done num="8" name="n_dropped_speed2op.lisp" num_of_attempts="8">
<FileName>p_divide_gift_parens.lisp</FileName>
<stats cpn="9" nsd="13" ncir="0" mpn="13" msn="17" mlfcs="3" str="is" rspl="NIL" >
<Problem_Statement>Mom won "x" dollars in the lottery. She spent 20 dollars on groceries and split the rest up in presents for her 4 children. How much did each child get?</Problem_Statement>
<Tutor time="[10/18/2001][14:34:26][0]" qtype="QSYMB" goal="(x-20)/4">Hello. Please write an expression for the amount each child received. </Tutor>
<Student time="[10/18/2001][14:35:3][37]">(x-20)/4</Student>
<Tutor time="[10/18/2001][14:35:3][0]" qtype="NIL" goal="NIL">Correct. A new problem is needed </Tutor>
<problem_done num="9" name="p_divide_gift_parens.lisp" num_of_attempts="1">
<FileName>n_plane_time_saved.2op.lisp</FileName>
<stats cpn="10" nsd="13" ncir="1" mpn="13" msn="17" mlfcs="3" str="is" rspl="NIL" >
<Problem_Statement>Caroline was a pilot for a major airline. She flies from New York to Boston, which is a distance of about 300 kilometers. Today she flew faster than normal because she was flying with the wind. Her speed was "s" kilometers per hour. Normally the trip takes 2 hours. How much time did she save?</Problem_Statement>
<Tutor time="[10/18/2001][14:35:3][0]" qtype="QSYMB" goal="2-300/s">Hello. Please write an expression for the amount of time she saved. </Tutor>
<Student time="[10/18/2001][14:37:50][167]">2-(300/s)</Student>
<Tutor time="[10/18/2001][14:37:50][0]" qtype="NIL" goal="NIL">Correct. A new problem is needed </Tutor>
<problem_done num="10" name="n_plane_time_saved.2op.lisp" num_of_attempts="1">
<FileName>n3_rate_of selling.lisp</FileName>
<stats cpn="11" nsd="13" ncir="2" mpn="13" msn="17" mlfcs="3" str="is" rspl="NIL" >
<Problem_Statement>Mr. Smith was selling pears at the Farmers market. He began the day with "p" pears. Six hours later he had only 50 pears left. Write an expression for the hourly rate at which he has been selling pears.</Problem_Statement>
<Tutor time="[10/18/2001][14:37:50][0]" qtype="QSYMB" goal="(p-50)/6">Hello. Please write an expression for the rate at which he has been selling pears. </Tutor>
<Student time="[10/18/2001][14:38:51][61]">(p-50)/6</Student>
<Tutor time="[10/18/2001][14:38:51][0]" qtype="NIL" goal="NIL">Correct. A new problem is needed </Tutor>
<problem_done num="11" name="n3_rate_of selling.lisp" num_of_attempts="1">
------ You mastered that section(after posttest) ------
----survey ----
<realy_a_student I really am a student>
<how_hard 8>
<how_hard_debuging current_problem_num=12 masterlevelforcurrentsection=3>
<how_helpful_was_ML =3>
</section>
PreTest Answers="--sep0--3m+2s--sep0----sep1--x/30+y/40--sep1----sep2--3(40)+[(h-3)*55]--sep2--"
PreTest File=Posttest_cancer_like.3op Answers="3m+2s" Correctness=T
PreTest File=post_total time.3op Answers="x/30+y/40" Correctness=T
PreTest File=post_debbie_like_dis.4op Answers="3(40)+[(h-3)*55]" Correctness=NIL
<FileName>p_32FistOuncePlus20Cents.3op</FileName>
<stats cpn="1" nsd="15" ncir="0" mpn="20" msn="17" mlfcs="3" str="decomp" rspl="NIL" >
<Problem_Statement>The post office charges 33 cents for a one ounce letter. For each additional ounce the post office charges 20 cents. If you mail a "x" ounce letter, how much will it cost you in CENTS?</Problem_Statement>
<Tutor time="[10/18/2001][14:45:1][370]" qtype="QSYMB" goal="33+20*(x-1)">Hello. Please write an expression for the total cost of your letter in cents. </Tutor>
<Student time="[10/18/2001][14:46:17][76]">x/33*20+33</Student>
<Tutor time="[10/18/2001][14:46:18][1]" qtype="QSUB_QUAN_STRICTLY" goal="x-1"> Hmm. No. We will come back to the total cost of your letter in cents. Let me try to break this down for you. What is the number of ounces charged at 20 cents?</Tutor>
<Student time="[10/18/2001][14:46:45][27]">1</Student>
<Tutor time="[10/18/2001][14:46:45][0]" qtype="QSUB_QUAN_STRICTLY" goal="x-1"> No. Use "x" and "1" to calculate the number of ounces charged at 20 cents.</Tutor>
<Student time="[10/18/2001][14:46:57][12]">x</Student>
<Tutor time="[10/18/2001][14:46:57][0]" qtype="QSUB_QUAN_STRICTLY" goal="x-1"> No. What is the number of ounces charged at 20 cents? Hint: pick one of these: x-1, 1-x, x+1, x*1, x/1, or 1/x.</Tutor>
<Student time="[10/18/2001][14:47:24][27]">x-1</Student>
<Tutor time="[10/18/2001][14:47:24][0]" qtype="QSUB_QUAN_NOT_STRICTLY" goal="20*B">Correct. If "B" was the number of ounces charged at 20 cents then what would be the cost of the additional ounces? </Tutor>
<Student time="[10/18/2001][14:47:39][15]">b*20</Student>
<Tutor time="[10/18/2001][14:47:39][0]" qtype="QSUBSTITUTE" goal="20*(x-1)">Correct. You are correct that "20*B" is the cost of the additional ounces. Now, can you state this in terms of the numbers given in the problem?</Tutor>
<Student time="[10/18/2001][14:48:20][41]">(x-1)20+33</Student>
A stricly higher question was satsified
<Tutor time="[10/18/2001][14:48:20][0]" qtype="NIL" goal="NIL">Correct. A new problem is needed </Tutor>
<problem_done num="1" name="p_32FistOuncePlus20Cents.3op" num_of_attempts="6">
<FileName>p_two_jobs.like distance</FileName>
<stats cpn="2" nsd="15" ncir="0" mpn="20" msn="17" mlfcs="3" str="decomp" rspl="NIL" >
<Problem_Statement>Mark is a trucker who always drives 40 hours each week. Some of the time he drives in New Jersey where the speed limit is 55 miles per hour. Other times he drives in New York where the speed limit is 65 miles per hour. He does not drive anywhere else and he always drives 40 hours a week. Suppose this week Mark drives "j" hours in New Jersey at 55 miles per hour. Write an expression for the total miles he drove this week.</Problem_Statement>
<Tutor time="[10/18/2001][14:48:20][0]" qtype="QSYMB" goal="55*j+65*(40-j)">Hello. Please write an expression for the total miles he drove this week. </Tutor>
<Student time="[10/18/2001][14:52:5][225]">[(40-j)*65]+(j*55)</Student>
<Tutor time="[10/18/2001][14:52:5][0]" qtype="QSYMB" goal="55*j+65*(40-j)">It looks like you didn't understand what I was asking you. That is not a valid math expression. Try this question again:Please write an expression for the total miles he drove this week. </Tutor>
<Student time="[10/18/2001][14:54:9][124]">(j*55) + (40-j)65</Student>
<Tutor time="[10/18/2001][14:54:9][0]" qtype="NIL" goal="NIL">Correct. A new problem is needed </Tutor>
<problem_done num="2" name="p_two_jobs.like distance" num_of_attempts="2">
<FileName>slope_candle_rate.3op.lisp</FileName>
<stats cpn="3" nsd="15" ncir="0" mpn="20" msn="17" mlfcs="3" str="decomp" rspl="NIL" >
<Problem_Statement>A candle was 8 centimeters tall at 4 P.M. Later that evening it was "x" centimeters tall at "y" P.M. Assume a constant rate of burning. Write an expression for its rate of burning in centimeters per hour. </Problem_Statement>
<Tutor time="[10/18/2001][14:54:9][0]" qtype="QSYMB" goal="(8-x)/(y-4)">Hello. Please write an expression for the rate of burning. </Tutor>
Student did not do anything for 900 seconds so I am quitting
Student Restarted and appending beginning
Begun
<FileName>slope_candle_rate.3op.lisp</FileName>
<stats cpn="3" nsd="15" ncir="0" mpn="20" msn="17" mlfcs="3" str="decomp" rspl="NIL" >
<Problem_Statement>A candle was 8 centimeters tall at 4 P.M. Later that evening it was "x" centimeters tall at "y" P.M. Assume a constant rate of burning. Write an expression for its rate of burning in centimeters per hour. </Problem_Statement>
<Tutor time="[10/18/2001][16:13:54][0]" qtype="QSYMB" goal="(8-x)/(y-4)">Hello. Please write an expression for the rate of burning. </Tutor>
<Student time="[10/18/2001][16:15:1][67]">(8-x)/y</Student>
<Tutor time="[10/18/2001][16:15:2][1]" qtype="QSUB_QUAN_STRICTLY" goal="y-4"> No. But, "8-x" is correct for the change in the candle height. We will come back to the rate of burning. Let me try to break this down for you. What is the change in the amount of time?</Tutor>
<Student time="[10/18/2001][16:15:25][23]">y-4</Student>
<Tutor time="[10/18/2001][16:15:25][0]" qtype="QSUB_QUAN_NOT_STRICTLY" goal="C/B">Correct. If "C" was the change in the candle height and "B" was the change in the amount of time then what would be the rate of burning? </Tutor>
<Student time="[10/18/2001][16:15:53][28]">c/b</Student>
<Tutor time="[10/18/2001][16:15:53][0]" qtype="QSUBSTITUTE" goal="(8-x)/(y-4)">Correct. Now, lets try this question again: You are correct that "C/B" is the rate of burning. Now, can you state this in terms of the numbers given in the problem?</Tutor>
<Student time="[10/18/2001][16:16:23][30]">(8-x)/(y-4)</Student>
<Tutor time="[10/18/2001][16:16:23][0]" qtype="NIL" goal="NIL">Correct. A new problem is needed </Tutor>
<problem_done num="3" name="slope_candle_rate.3op.lisp" num_of_attempts="4">
<FileName>n_hill_3u-10d.3op.lisp</FileName>
<stats cpn="4" nsd="15" ncir="0" mpn="20" msn="17" mlfcs="3" str="decomp" rspl="NIL" >
<Problem_Statement>Fransico can hike up-hill at a speed of 4 kilometers per hour. Walking down-hill he can go at a much faster rate of 7 kilometers an hour. One morning he set out to climb a nearby hill that has a trail that is "x" kilometers long. How much additional time did it take him to go up-hill rather than down?</Problem_Statement>
<Tutor time="[10/18/2001][16:16:24][1]" qtype="QSYMB" goal="x/4-x/7">Hello. Please write an expression for the additional amount of time needed to go up-hill. </Tutor>
<Student time="[10/18/2001][16:19:3][159]">x./(7-4)</Student>
<Tutor time="[10/18/2001][16:19:3][0]" qtype="QSYMB" goal="x/4-x/7">It looks like you didn't understand what I was asking you. That is not a valid math expression. Try this question again:Please write an expression for the additional amount of time needed to go up-hill. </Tutor>
<Student time="[10/18/2001][16:19:32][29]">x/3</Student>
<Tutor time="[10/18/2001][16:19:32][0]" qtype="QSUB_QUAN_STRICTLY" goal="x/7"> Hmm. No. We will come back to the additional amount of time needed to go up-hill. Let me try to break this down for you. What is the time to go down-hill?</Tutor>
<Student time="[10/18/2001][16:19:43][11]">7</Student>
<Tutor time="[10/18/2001][16:19:43][0]" qtype="QSUB_QUAN_STRICTLY" goal="x/7"> No. Use "x" and "7" to calculate the time to go down-hill.</Tutor>
<Student time="[10/18/2001][16:19:50][7]">x/7</Student>
<Tutor time="[10/18/2001][16:19:50][0]" qtype="QSUB_QUAN_STRICTLY" goal="x/4">Correct. What is the time to go up-hill?</Tutor>
<Student time="[10...