During the 1982-83 school year, the Sheridan County School District implemented a 4-day school week alternative schedule. The alternative schedule was approved by the Wyoming State Board of Education on two conditions. First, the State Attorney General must affirm the State Board's right to permit alternative scheduling. Second, an outside evaluation of the approach must be made. The services of the Northwest Regional Educational Laboratory were contracted by the District to plan and conduct an impartial evaluation. The overall purpose of the evaluation was to provide information which would be of value in weighing the advantages and disadvantages of the alternative schedule. The most apparent effect of the four-day schedule was the generation of interest, enthusiasm and support for quality schooling on the part of all segments of the educational community--parents, teachers, students, and administrators. While the findings hint at benefits to be realized from the Sheridan plan, neither positive nor negative outcomes in student achievement could be shown. The community impact was split: most parents saw Fridays as positive opportunities for family activities, but families where both parents were working and the children were of elementary age viewed the four-day week negatively. (BW)