This product contains 28 different shapes (4 rectangular prisms, 8 triangular prisms, 4 spheres, 4 cones, 4 square pyramids, 4 cylinders) with QR codes. Students are to find the volume of each shape (using an appropriate formula) and then scan the QR code to check their work.
Note: You must have a QR code scanning device (iPod touch, iPad, Smartphone, etc.) to scan and use the QR codes).
This activity is also included in my Geometry Bundle