In this study the achievement of eighth grade mathematics students who produced their own visual learning materials on topics in the curriculum was compared with eighth graders who did not have this opportunity. Two groups of eighth grade mathematics students were assumed to be equivalent due to their random selection and their comparable I.Q. and pre-test scores. The students in the experimental group were allowed to produce their own filmstrips on various topics in the mathematics curriculum. A post-test showed that students in the experimental group did not learn more than those in the control group. However, observation showed that the filmstrip project did have a strong interest and motivational value. The poorer and the brighter students both became more involved with their projects than did the middle third of the group. (JK)