Students should not make all their predictions first because they can make more accurate predictions after they have seen how many washers it takes for other surfaces. The students will be divided into groups of 3-4 students working at desks or tables. The entire lesson will take approximately 40 minutes. Students will need to work cooperatively sharing materials and taking turns. Teacher will begin the lesson with a class discussion.
Students can gather in a semicircle on the floor around the teacher.
This discussion should consist of the lesson explanation, introduction of terms such as prediction, results, and friction, and behavioral expectations. Before beginning the actual activity, the teacher should provide an example. Have the students make a prediction for one of the surfaces and then actually do it so they can see the difference between their prediction and the results. After the discussion break the students into small groups by numbering off or whatever works best for that particular class. Pass out materials and data sheets to each group.