Abstract: A calculus teaching aid includes a substrate, a plurality of visual components configured to define a two-dimensional graphical model of the first derivative, and a plurality of symbolic labels configured to define a variety of characteristics of the graphical model. The substrate, visual components and labels are preferably magnetized for secure attachment to one another. The calculus teaching aid may be configured in a plurality of different ways to demonstrate the various aspects of the first derivative.

Abstract: A geometric figure teaching aid includes a base, a rod affixed to and extending from the base, and a series of side members interconnected with the base and the rod. The base is preferably formed of a translucent material, and the rod is mounted to the base at a first end and terminates at a second end spaced above the base. The side members extend from edges defined by the base member and are engaged with the rod at the second end of the rod. Clips are mounted to the side members, and are adapted to receive labels for identifying characteristics of the geometric figure represented by the side member, or to carry a given value corresponding to a problem. Lines are provided on the base, extending from the center of the base, from which the rod extends, outwardly to locations at which the side members are engaged with the base. The lines correspond to dimensions or aspects of the geometric figure.