When was the survey conducted can you think of a more

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When was the survey conducted? Can you think of a more convincing way to set the survey? How do the ways data was collected affect your interpretation of the results?
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Teacher guide Interpreting Data: Muddying the Waters T-5 SUGGESTED LESSON OUTLINE Review individual solutions to Muddying the Waters (10 minutes) Remind students of their work on the assessment task. Recall the work you did in the last lesson on river pollution. In this lesson you will build on that work. Return the papers to the students. If you chose to write questions on the board rather than on individual papers, display them now. I read your papers and I’ve some questions about them. I’d like you to work on improving your answers for a few minutes, using my questions. Ask students to work on their own for a few minutes, answering your questions. Interactive role-play introduction (10 minutes) To introduce the lesson task, use a projector and Slides P-3 to P-8 from the projector resource: Exhibits 1, 2, 3, 4, Scene 1: The Assistant DA’s office, and Scene 2: At the Factory. If you do not have a projector, hand out printed copies of these Slides. You also need four copies of the role-play script, A Case of Muddying The Waters (one copy for each actor and one copy for yourself.) In the next section of this lesson you will be working on river pollution again. The role-play sets the scene. Ask the actors to read out the script. Advise them to talk slowly and to pause at the end of each sentence, as the script contains a lot of information. Encourage the students to listen carefully to the facts being presented about the river pollution. Collaborative small-group work (25 minutes) Once the students have acted out the scenes turn to the class and say: The case goes to court. The Assistant DA prosecutes the Factory Owner for polluting the river. What does ‘prosecution’ mean? Your task now is to be the judges. You have to reach a fair judgment about who wins the case. Organize students into groups of two or three. Provide each small group with a copy of the Case Notes worksheet. The Case Notes contain the map, information from the script, and arguments made in court by the Environmental Officer and the Factory Owner. Help students to understand the task and its context: I’m giving you a copy of the arguments presented in court. Read through the information carefully. Case Notes Background Information Last year, a small dam was built across the river just upstream of the Riverside Center and the factory. The factory discharges a toxic chemical into the river. Exhibit 1: Map of the Riverside Area Judge’s notes: Environmental Officer’s Evidence Exhibit 3: Bar chart showing level of chemical concentration in river water Chemical concentration in river water in mg per cubic meter. Year 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 2008 2009 2010 Legal level for the chemical is 8 mg per cubic meter of river water.
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Teacher guide Interpreting Data: Muddying the Waters T-6 Write notes on what you think the data and statistics show.
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