This survey originally appeared in N. L. Gage (Editor), Handbook of Research on Teaching, published by Rand McNally & Company in 1963, under the longer tide "Experimental and Quasi-Experimental Designs for Research on Teaching." As a result, the introductory pages and many of the illustrations come from educational research. But as a study of the references will indicat<:,the survey. draws from the social sciences m general, and the methodological recommendations are correspondingly broadly appropriate.