This hands-on math and science activity helps students learn and understand the value of pi. Teachers will need to group students in four's and have sufficient sets of cans--4 cans for each group. You can ask for clean donations from students or just collect the cans from your own home. Please make sure the can edges are not sharp, or cover any edges with masking tape. Teachers, you will also need flexible tape measures available from fabric or sewing stores. The activity can be used to teach measuring skills, metric measurements, circumference, and the area of circles. Please contact me if you would like a list of possible answers to the questions on page 2.