This document provides guidelines for the preparation of school district plans for implementation of the microcomputer instructional programs recommended for Arkansas high schools. Introductory materials include a history and description of the Instructional Microcomputer Project for Arkansas Classrooms (IMPAC), results of a state-wide microcomputer survey, a statement of IMPAC's philosophy and goals, and recommendations to school administrators for providing leadership to their schools' microcomputer activities. Descriptions are then provided of six areas in which high schools have used microcomputers for instructional purposes: (1) computer-managed or computer-assisted instruction; (2) computer-assisted teaching; (3) computer education courses; (4) business education courses; (5) problem solving; and (6) information management. Recommendations are also provided for selection of software and hardware, space and furniture, and teacher inservice training. Appendices contain a school district planning guide, a list of software evaluation sources, and three different evaluation forms, suggestions for selecting a microcomputer and peripherals, equipment bid specifications and maintenance agreements, a list of members of the computer science course content guide committee, recommendations for classroom facilities (classrooms and laboratories) and electrical equipment, a list of institutions that provide computer courses which meet state guidelines, and outlines of three levels of state-recommended inservice courses for teachers and instructional coordinators. (JB)