1. AIRAISIAN, P. W. 1969. “Formative evaluation instruments: A construction and validation of tests to evaluate learning over short time periods”. University of Chicago. Unpublished Ph.D. dissertation
2. BLOCK, J. H. 1970. “The effects of various levels of performance on selected cognitive, affective, and time variables”. University of Chicago. Unpublished Ph.D. dissertation
3. BLOCK, J. H. 1973. Mastery learning in the classroom: An overview of recent research. Paper presented at American Educational Research Association Annual Meeting. February281973, New Orleans.