Keep your students engaged with the circuit format! This circuit has 8 problems which are either volumes from revolution (require disks, washers, shells) or volumes built out of a fixed base with known cross sections (e.g. semi-circles, squares, triangles). Students must sketch the region (graphs provided), then set up the definite integral(s) to calculate the volume. Finally, students must use technology to calculate the definite integrals. To advance in the circuit students search for the