Without effective cooperative planning between the learning disabilities teacher and the regular classroom teacher, the probability of successfully mainstreaming an LD adolescent into the regular classroom is greatly reduced. Cooperative planning is an educational programming and monitoring arrangement between special and regular educators on behalf of LD students. This article presents the thesis that a major part of the learning disabilities teacher's role is to assist the mainstream teacher in developing and implementing instructional alternatives. The authors delineate prerequisites for bringing about educational change in the mainstream and specify a sequence of steps for systematically creating change in the regular class on behalf of LD adolescents.