This document discusses the principles and process of effective demonstration in teaching. It defines demonstration as showing how things are done to emphasize utility and efficiency. There are three types of demonstration: those directed at an audience, those involving the process of speaking, and those showing a product, method, or proofs. Key principles of demonstration include establishing rapport, avoiding assumptions about audience knowledge, and highlighting important points. The document provides steps to plan a demonstration, including determining objectives, materials, and rehearsal. It offers tips for conducting a demonstration, such as setting a tone, keeping it simple, summarizing as you go, and evaluating effectiveness through student understanding and concentration.