Compared effectiveness of discovery and expository instructional strategies on science knowledge and attitudes of fifth-grade Egyptian students (N=276). Although there were no sex differences, students taught by discovery scored higher in achievement (recall and application) and attitudes than those taught by the expository method. (JN)

The present study makes use of the capabilities of computerized environments to enable simultaneous display of molecular representations that correspond to observations at the macroscopic level. This study questions the immediate and long-term effects of using a multimedia instructional unit that integrates the macroscopic, symbolic, and molecular…

Our main goal in this study was to explore whether the use of models in molecular genetics instruction in high school can contribute to students' understanding of concepts and processes in genetics. Three comparable groups of 11th and 12th graders participated: The control group (116 students) was taught in the traditional lecture format, while…