REFERENCES
- Saralee Amsden, “Have You Ever Tried Contracting for Grades?”, English Journal, Vol. 59 (December 1970), 1279–1282.
- Coordinating Board, Texas College and University System, Development of Community Junior Colleges in Texas, Austin: The Coordinating Board, 1968.
- D. K. Gillespie, “Differential Unit Assignments,” Journal of School Health, Vol. 36 (February 1966), 80–86.
- Ralph T. Heimer, Frank T. Kocher and John J. Lottes, A Program in Contemporary Algebra, New York: Holt, Rinehart & Winston, Inc., 1970.
- Jerry J. Herman, “Individualize Your Instruction by Contract Teaching,” Clearing House, Vol. 37 (May 1963), 551–554.
- Lloyd J. Ogilvie, “An Individualized Mathematics Program in Junior High School,” The Arithmetic Teacher, Vol. 19 (January 1972), 53–57.
- R. Donald Perry, “An Experiment in Teaching Elementary Algebra,” Two-Year College Mathematics Journal, Vol. 2, No. 2 (Fall 1971), 40–16.
- Morris A. Shirts, “The College Grade Contracts,” Educational Forum, Vol. 32 (May 1968), 456–458.