Students calculate and compare volume for common 3D solids (prisms, pyramids, cylinders, cones, and spheres) using Montessori-style, step-by-step command cards. This volume study for upper elementary is a set of 11 command or activity cards numbered for easy reference and organization. Use these cards for your child or student to: improve concentration, coordination, independence, and problem-solving skillsdevelop visual discriminationmatch solid objects with solid (3D) figures to assist the m