Described is a prototype computer assisted teacher training system (CATTS) to provide continuous immediate feedback to teacher trainees. The importance of immediate feedback in teacher education is discussed. Advantages of CATTS are explained to include the adoption of a broad spectrum of observable teacher and pupil behaviors, and the rapid cumulative storage and retrieval of all training sessions. Preliminary support for the efficacy of CATTS as a training tool for teachers of the educable retarded is reported. (CL)