A voluntary quinmester plan for extending the school year was tried in five Knox County Tennessee schools. Ten University of Tennesse faculty members teamed to evaluate the program's K-12 curriculum revision, administration, public opinion, costs, student and staff morale, and student achievement. Achievement was not significantly influenced, but three-fourths of every group affected liked year-round operation. Nevertheless, only 12 percent of the eligible students attended the summer quinmester, so the school board eliminated the program after its second year. The evaluation team concluded that the future of year-round education depends on selling summer attendance to the community and demonstrating student achievement gains. (Author)