The main objective of this project was to develop effective multi-sensory aids for individual use by high school students who have not achieved a functional mastery of mathematics. Nineteen audiovisual devices directed specifically at the low achiever were developed from three specific devices--audio tape, audio tape with slides, and video tape. Two types of exercises were developed using audio tape. One type is an exercise designed to increase the low achiever's speed with basic facts and skills, and the other is a story problem exercise. Thirteen audio tape and slide programs were developed from materials utilizing fundamental concepts in mathematics. Finally, four video tape programs were developed for fractions, story problems, area, and volume. Responses to follow-up sheets administered to participating students have shown that these audiovisual materials represent an advance in the individualizing of instruction for low achievers among high school students. (RP)