This report describes findings on the feasibility of extended school year plans and outlines several approaches which can be recommended for their economical and educational implementation. Six plans are recommended: (1) the continuous learning year cycling plan which will release 25 percent of existing space in the first year; (2) the multiple variations such as the 45-15 or 9-3 plan which will release 33 1/3 percent of existing space in final year; (3) the multiple trails plan which may release up to 35 percent of classroom space and/or 50 percent in an occupational training center; (4) the acceleration trimester plan which will release space for one class at the end of trimester four (a year and a quarter); (5) the acceleration quadrimester nine (2 1/4 years); and, (6) the acceleration split trimester and split quadrimester which will release space for one class at the end of 2 to 3 years. Discussions of economy, including Teacher salaries and staff utilization, and educational objectives are also presented. It is held that as a result of the New York State experience, this experiment is ready to enter into a more extensive, practical application in school districts which want to realize the basic objectives for rescheduling a school year. (KG)