This document presents a three-step model for providing teachers with basic information on year-round or extended school plans. As a first step, descriptions of basic plans are given. The four used in this paper are Staggered Quarter for All, Full 48-week School Year for All, Voluntary Summer Program, and A Summer Program for Professional Personnel. After there is a common basis of understanding of the general characteristics of the year-round or extended school and of the four specific plans, the second step is initiated. This involves dividing the group into smaller groups, one for each plan to be discussed, and having the individuals in each group choose the role they wish to play: principal, superintendent, teacher, school board member, townsperson, or student. The task of each group is to discuss the plan assigned with reference to their own particular school situation, determine the advantages and disadvantages of the plan, and make a recommendation to the larger group. As the third step, each group reports its findings, and the facilitator of the simulation again summarizes some of the characteristics of the plans which have been used and mentions some of the more common modifications of these plans and locations where implementation is taking place. He might also summarize some of the advantages and disadvantages of various plans as derived from the national conferences on the topic. (DDO)