Each class should be made up of three types of students: Above grade level (A’s) Below grade level (D-F’s) On grade level (B-C’s).Each group, which will now be referred to as A (above), B (below), and O (on). These groups will be separated in each class (honors class denoted with h). “No-homework group” or control (c) group. After introducing a unit, homework will be assigned, with cA, cB, cO, and cAh, cBh, and cOh, completing homework as normal. The remaining groups will be instructed that they will have no homework for the unit. To keep things “fair” with all students, the groups will be reversed for the next unit.