Make enough copies of the clues in Handout 1 for each student to have at least one clue. With 27 students make three set of clues and give each student one clue. With 30 students make four sets, divide the students into groups of seven to eight, and give some students two clues, and so forth. Teaching Procedures Explain that the purpose of this lesson is for students to sharpen their critical thinking skills by using clues to solve a mystery about garbage disposal. Remind the group to think economically.
People respond predictably to positive and negative incentives.
Read the mystery in Handout 1 to the class. Invite the students to speculate about what the solution to the mystery might be. Divide the class into small groups. Ask each group to select a discussion leader. Give each group a copy of the mystery in Handout 1.