The Differential Aptitude Tests (DAT) have been widely used in junior and senior high schools since 1947. The DAT Career Planning Program is a modification of the methods of collecting, interpreting, and reporting test data from those tests in conjunction with additional information about students gathered at the time of testing. This modification consists of the addition of a written report which interprets the educational and vocational planning implications of the student's DAT scores. Besides the DAT (Forms L, S, or T), the DAT Career Planning Program includes the Career Planning Questionnaire and the DAT Career Planning Report. This counselor's manual explains the general purpose of the program and its content and rationale. The development of the program is discussed in terms of the classifications used, relationship of test scores and school subjects to occupational fields, and students' individual characteristics. Interpretation and uses of the report are also discussed. Three appendixes and a 25-item reference list are included. Items related to the counselor's manual as part of the program are available from the source cited. (Author/AG)