A three-year trial of a voluntary quinmester plan for extending the school year began in June 1974 in five Knox County, Tennessee, schools. Curriculum revision, K-12, was the principal thrust of the ESY (Extended School Year) project, but administrators also hoped to relieve overcrowding in the schools and to effect more efficient use of…

Evaluation questionnaires were administered to more than 92 percent of the professional staff associated with the Knox County Extended School Year (ESY) Program during the summer and fall of 1974 and to more than half of the students enrolled in the summer quinmester, along with a random sample of 10 percent of the students enrolled in October…