This handbook for teachers offers guidance on introducing computer literacy into elementary and secondary classrooms. It includes a list of computer concepts exemplified by each step in learning to write programs in BASIC Programming Language and the objectives for the elementary and secondary activities; suggestions for using computers in classrooms; and learning activities for elementary and secondary students. For elementary students, activities deal with PRINT and GOTO statements, computer arithmetic, variables and values, INPUT statements, IF-THEN statements, FOR-NEXT loops, string manipulation, random numbers, arrays, nested loops, low resolution graphics, flowcharts, and activities without the computer. Secondary activities cover PRINT statments; GOTO, CTRL C, comma, and semicolon; INPUT command, variables, ON-GOTO; FOR-NEXT; string manipulation; concepts of probability; writing a program in the form of a multiple choice quiz using several commands; READ-DATA; arrays; programming to find roots of a polynomial; LEFT, RIGHT, MID$; word scramble program (concatenation); text files; reaching objectives by using files; writing a library program using text files; text windows; writing programs using a counter; quadratic equations; graphics; and programs to explore the world of low resolution graphics. (LMM)