Abstract
This study examined the effectiveness of three methods of teaching concepts. Reading-recitation method, a presentation of examples and non-examples only,and Merril and tennyson’s model. Sixth-grade students were randomly assigned to one of the three experimental treatment groups. Two social studies concepts, arable land and tertiary production,were the topics of the lessons. Results of a 3x3x2 factorial AVOVA indicated that the Merrill and Tennyson model was more effective than either Gagne’s model or the reading-recitation method. No significant aptitude treatment interactions were found.