The test guide was prepared to assist applicants who are preparing for the Ground Instructor Written Test. It supersedes the 1967 examination guide. The guide outlines the scope of the basic aeronautical knowledge requirements for a ground instructor; acquaints the applicant with source material that may be used to acquire this basic knowledge; and presents sample test items with answers, explanations, and illustrations representative of those used in the current Ground Instructor Written Test. An appendix contains weather information, aircraft description, performance data, the flight planning data, excerpted information from the "Airman's Information Manual," diagrams, charts, and illustrations related to some of the test questions. (Author/AG)