Teaching Geometric Optics: research, results and educational implications

Abstract

In this study we attempt to evaluate two models of instruction, one based on the assumptions of the constructivist or conceptual change model, and one based on an expositive‐deductive model. We applied the two approaches to the teaching of geometric optics at different levels of instruction: elementary school and university. In each case the same teacher taught the same scientific topic to both the control and experimental groups, and all students carried out the same classroom activities. The study was carried out in such a way as to replicate as closely as possible the actual conditions of each classroom environment. The results of instruction failed to show significant differences in learning attributable to the method of instruction used, although different trends were evident in the two samples. Our commentary on the findings concludes with suggestions for further research in this field.