An investigation was made to determine the instructional function of the professional media staff in a school. The objectives of the study were: (1) to develop a model to add the expertise of the media specialist to the teaching team; (2) to access the effect the model had on the academic achievement and self-concept of students; and (3) to determine the effect the model had on the attitudes and instructional performance of educators. The study was divided into five parts. Part 1 developed a rationale for making the expertise of the media specialist available to the teaching team, and part 2 introduced the theoretical model of the instructional function of the media specialist. Part 3 dealt with the implementation of the theoretical model at Fort Clarke Middle School in Gainsville, Florida, and part 4 examined the evaluation information emerging from the project. Finally, part 5 summarized the conclusions and recommendations that grew out of the investigattion. (Author/HB)