Briefly discuss some of the environmental concepts discussed in the book. To help guide discussion we will ask the following questions to the whole class. Introduce the K.W.L. Chart and inform those students who are unaware of what it is. Have students mark the back of each index card with a design that they will be able to identify at the end of the week-long experiment. Or just write placement location on the back of the card.
Children punch a hole at the end of each card so it can hang on a piece of yarn.
Give students petroleum jelly to spread across one-side of each card. Have children hang these card traps in different places around the school and at home. Also, set up a few cards indoors. On the information sheet, students record the places where traps were left. Ask students to guess which cards will show the most pollution and record reasons for the hypothesis.