This technical report describes the development of the College-Level Academic Skills Test (CLAST), an instrument designed to measure Florida college students' achievement of the computation and communication skills expected by the completion of their sophomore year. Section I covers CLAST's background and purpose, the requirement that all students seeking an associate in arts degree or upper-division university status take CLAST, the use of CLAST scores, and the test administration plan. Section II traces the development of CLAST, explaining the process of identifying and validating essential academic skills; the identification and review of existing tests; test and test item specifications; and the process used in item development, review, and analysis. Descriptions of CLAST and its computation, reading, writing, and essay subtests are provided in section III. Section IV explains the development of CLAST forms, focusing on procedures related to the item bank development, test assembly, test instructions, quality control, and test analysis. After section V assesses CLAST's validity, section VI reviews technical aspects of CLAST's development, including calibration methods, generation of ability estimates, test equating, score reliability, item bias prevention, and item analysis. Section VII explains scoring and reporting procedures, and section VIII summarizes 1982-83 CLAST administration results. Appendices present a glossary, relevant laws, skills assessed, project members, and CLAST item review forms. (LAL)