This document discusses various types of visual symbols that can be used in teaching, including drawings, cartoons, strip drawings, diagrams, charts, graphs, and maps. It provides examples and definitions of different types of diagrams, charts, graphs, and maps, such as affinity diagrams, tree diagrams, fishbone diagrams, time charts, flow charts, organizational charts, pie graphs, bar graphs, and different types of maps. The overall purpose is to explain how these visual symbols can be helpful teaching tools and to showcase different examples of each type.