This test manual provides information on the development, characteristics, and use of the Individualized Instruction Inventory (III), a 64-item behavioral instrument designed to assess the extent to which community college instructors use individualized instruction in the classroom. The manual begins by providing a brief overview of the III, followed by background on individualized instruction and the character and purpose of the scale. The manual then describes the III's development and the nature and meaning of the eight independent factors it assesses: (1) systematic individualized learning activities and course design; (2) self-pacing; (3) life/career practical application; (4) student responsibility for achievement; (5) student involvement in learning; (6) learning contracts; (7) interpersonal student-teacher relationships; and (8) use of available school resources. A discussion of the use of the III and guidelines for self-administering and scoring the scale are followed by data on national III norms, based on scores from 1,012 community college instructors from 36 colleges across the country, and psychometric data on the III's reliability and validity. The final sections of the manual review recent research using the III and its concepts and commentaries on crucial elements of individualized instruction. References and the III are appended. (AYC)