This document discusses a study that evaluated the effectiveness of using strategic intervention materials to improve 4th grade students' academic performance in science. It found that students who were taught using the strategic materials performed better on pre- and post-tests compared to students taught using traditional methods. The study developed science intervention materials aimed at reteaching least mastered concepts and skills. It assessed 330 4th grade students, with some sections taught traditionally and others using the new materials. Students using the materials showed greater gains in science performance compared to those taught traditionally.