Check your estimate by covering the bottom of the box. Stop after covering the bottom. The student applies measurement concepts. Students bend one of the paper clips to form a hook to attach the cup to one end of a rubber band. They attach the other end of the rubber band to the other paper clip that is taped to the table or desk.
Students first measure the length of the rubber band with just the empty cup attached.
Then they put two pennies in the cup at a time, each time measuring the length of the rubber band after the pennies have been added. Students compare the results for the different rubber bands and write summary statements of their observations. Tell me about the results of your study. Tell me about it. Tell me about it.