This document defines and describes various types of graphic materials used for instructional purposes. It discusses drawings, illustrations, charts, diagrams, graphs, posters, cartoons, maps, and globes. Drawings and illustrations are nonphotographic representations used to visualize concepts. Charts such as flowcharts and tables present relationships between data. Diagrams use lines and symbols to show relationships. Graphs represent numerical data visually. Posters combine images and words to convey brief messages. Cartoons use exaggerated features to provide humor. Maps represent the Earth's surface for various purposes such as physical features or political boundaries.