References
- Bloom , Benjamin S. , ed. 1956 . Taxonomy of Educational Objectives. The Classification of Educational Goals. Handbook I. Cognitive Domain , New York : David McKay Company .
- Wallen , Norman E. and Travers , Robert M. W. 1963 . “Analysis and investigation of teaching methods.” . In Handbook of Research on Teaching , Edited by: Gage , N. L. 452 – 465 . Chicago : Rand McNally and Company .