Shows how "3-2-1 Contact," a public television science series, was applied to social studies instruction, identifying "Sesame Street" and "Square One TV" as additional educational resources produced by Children's Television Workshop. Lists classroom materials available for use with CTW programs, states U.S. copyright laws for using videocassettes, and describes KIDSNET, a computerized clearinghouse for pre-school to high school students. (GEA)