This document discusses contrived experiences, which are edited copies of reality that are used as substitutes for real things in the classroom when it is not practical or possible to bring the real thing. Contrived experiences include models, mock ups, specimens, objects, simulations, and games. They are used to overcome limitations of space and time, edit reality to focus on parts or processes, overcome difficulties of size, understand inaccessible concepts, and help learners understand abstractions. Common contrived experiences are models, which are small reproductions of real things made of synthetic materials, and mock ups, which create representations of reality.