In three parts, this booklet provides elementary teachers with definitions of essential computer terminology and examines instructional uses of computers and computer-related activities. Terms defined are computer, interactive computing, computer hardware, computer software, and programming languages. Part 2 explores the main categories of the educational use of computers (administrative, instructional, and research), the impact of computers on the curriculum (stressing the importance of computers as problem-solving tools), computers as aids to instruction (including computer-augmented learning, computer-managed instruction, and computer-assisted instruction), computer literacy (stressing student awareness and specific instruction in precollege education), the role of calculators in elementary education, and the need for elementary school teachers to be calculator and computer literate. Part 3 contains a variety of computer-related activities that can be used in an elementary school or in a teacher training setting. The need for access to computer equipment and the degree of teacher knowledge vary according to the activity. The booklet includes an appendix with references, a glossary, and an 11-entry guide to periodical literature dealing with pre-college instructional uses of computers. (PB)