The document is part of the final report on Project STEEL (Special Teacher Education and Evaluation Laboratory) intended to extend the utilization of technology in the training of preservice special education teachers. This volume focuses on the first of four project objectives, the development and implementation of a microcomputer-based assessment system for preservice special education teachers. Activities of Year 1 included data gathering on teacher behaviors, software development, observer training and field testing, and trainee feedback. Year 2 activities involved revision of the microcomputer-based observation system (MBOS), Project STEEL observation system field tests, application to the undergraduate program, use by graduate supervisors, and students' reactions to the system. Year 3 activities included evaluation of the preservice teacher group data, and an effectiveness study. This study is presented in its entirety. Preservice special education students (N=27) in the multiple baseline study received information on the concept of Academic Learning Time (ALT) and the relationship between this information and MBOS. Feedback was provided in the form of either traditional field notes or computer-based feedback. Results demonstrated that the computer-based feedback significantly increased rates of effective teaching behavior compared to field note feedback. (DB)