The Single Skill Training (SST) Courses were developed to meet staff development needs by providing short, concentrated training modules in the areas of mainstreaming handicapped students, providing individualized instruction, and implementing a Competency-Based Curriculum (CBC). The program was set up to offer staff development courses to public and nonpublic school teachers in the District of Columbia. Each course was evaluated according to content mastery and the value of the course. Results were reported in terms of four objectives: to offer at least 40 different inservice modular courses in areas related to CBC, the education of the handicapped, individualizing instruction, behavior management, and classroom management; for each participant, after 3 hours of instruction, to demonstrate satisfactory mastery of the skill taught; to develop and offer a maximum of eight SST modules to facilities and other school groups from whom requests based on instructional needs have been received; and to package and make available at least three exemplary modules for individual school groups. Findings (which are offered in table form) included that the SST program produced a total of 46 courses during the school year, 7 of the courses were repeated because of high attendance and large demand, and the project coordinator reported both recertification and graduate credits to the appropriate offices. There were no discrepancies between the observed and expected inputs, processes or outcomes. The specification of requirements for mastery were contained in the course plan, and most of the instructors followed the course outlines which were submitted. Participants rated the course favorably. The project director disseminated the information about staff development modules, and two schools used the services. Appendixes contain an SST course listing, a sample instructor information sheet and guidelines for potential instructors, a diagram of an evaluation model schema, and a table with the SST courses questionnaire and results. (SW)