This study evaluates materials developed for low achievers by secondary mathematics teachers who participated in a summer conference. Fifteen pairs of experimental/control classes were involved. Materials were evaluated by data from achievement tests and attitude instruments. In addition, the teachers using the materials were asked for suggestions to improve the materials. School visitations to obtain teacher, student, and administrator reactions were made. Findings and conclusions based on the findings are reported. Students and teachers reported that most of the materials were used to supplement regular instruction. Comments indicated that students and teachers enjoyed using the materials more than regular materials. Test data indicated no significant increase in achievement or attitudes by those using the materials. (MK)