This developmental project with a research component was initiated at the Laurel County Vocational School with the major objective of determining if 2-hour instructional blocks could be operated in programs enrolling only secondary students. Subobjectives involved data gathering and statistical analyses on (1) student achievement, (2) ratings of instruction/instructors by students, and (3) ratings of performance of various factors by teachers. During the 1973-74 school year, class schedules were changed from three hours to two hours in length in the instructional areas of automotive mechanics, carpentry, drafting, industrial electricity, and air conditioning/refrigeration. Major concerns included scheduling problems between the county high school and the vocational school, the increased work load of the vocational school staff, and equipment use and repair necessitated by enrollment of new students. The overall conclusion was that the five program areas offered can be taught on the 2-hour block. The teacher's attitudes remained stable overall. Evaluations of teachers and instruction by students did not vary significantly even though the five program area teachers' ratings were not exactly alike. Student achievement was overall acceptable with significant increases in achievement test scores being noted. Although no specific products were developed as part of the project, other schools would be offered available information and assistance in revision of their traditional 3-hour programs. (HD)