Six Atlanta, Georgia, school systems initiated a four-quarter school year program in 1968-69. An exploratory study was conducted to develop procedures and instruments for a comprehensive examination of the plan. Strong support exists in all groups interviewed -- superintendents and steering committee members, students, parents, teachers, principals, and community influentials -- for continuation of the program. According to those interviewed, the four-quarter plan increases flexibility and uses human resources and physical facilities more efficiently. There is also basic agreement on perceived changes needed, reasons for changes, and possible advantages or disadvantages of the program. (Appendix and figure 5 on page 31 may reproduce poorly because of marginal legibility). (Author/RA)