Enrollment growth and a lack of classroom space influenced the school district of Jefferson County, Colorado, to consider a year-round school program. A study committee decided that a plan called Concept 6 was the most appropriate for addressing local needs. Under Concept 6, there would be six instructional terms; students would attend school for four terms and be on vacation for two terms; students would have access to the whole curriculum all year; three vacation plans would be offered; and 50 percent more classroom space would be provided through balancing the vacation choices of students. In 1972, a survey indicated where the program should be tested and revealed that most parents and practitioners supported the program. Advisory committees advised each other, identified concerns, responded to implementation plans, and helped to distribute information. A central coordinating committee helped coordinate plans for the program. During the pilot program, an evaluation validated the year-round program as an alternative for meeting classroom space needs. Eventually, all K-12 schools in the district adopted the year-round program; then, as enrollment growth receded and the taxpayers' refusal to support school construction ceased, schools started returning to the traditional school calendar. When employing year-round programs, practitioners should communicate their objectives and successes, select staff that will support the program, and obtain administrative support. (RG)