The effectiveness of four technical assistance-oriented services/products of one regional educational laboratory was studied. The services/products studied included a thinking skills activities workbook for classroom teachers, a videotape for rural educators on exemplary software for developing the thinking skills of at-risk students, a research report for urban school administrators on the interrelationships between student and teacher commitment, and a Chapter 1 program improvement and monitoring process (monitoring instrument, training, and ongoing consultation in the monitoring and improvement of Chapter 1 programs). A tracer study tracked the dissemination and use of services/products through exchanges of information with the external evaluators, following which the service/product providers and primary, secondary, and tertiary recipients were interviewed. Recipients were contacted by telephone by the evaluators between 6 months and 1 year after receipt of the service/product. The workbook and the program improvement and monitoring process were found to be more successful than the other two services/products in their degree of dissemination, assessment, and use. The workbook and the process met a defined need, they had a clearly specified target audience, their purpose and potential use were focused and unambiguous, and they could be used without extensive further direction; the videotape and the research report did not meet these criteria. Two references are included. (RLC)