1. Teaching concepts in the classroom: A set of teaching prescriptions derived from experimental research.
2. & Aptitudes and instructional methods. New York: Irvington, 1977.
3. The logic experiments on discovery. In and (Eds.), Learning by discovery: A critical appraisal, Chicago: Rand McNally and Company, 1966.
4. , & Kit of reference tests for cognitive factors. Princeton, N J.: Educational Testing Service, 1963.
5. Variables in discovery learning. In and (Eds.), Learning by discovery: A critical appraisal. Chicago: Rand McNally and Company, 1966.