This indepth study examines literature on the concept of the year round school, the experiences of those who have tried this approach to education, and the recent trends in this direction. Guidelines used in developing the study were (1) past or present experiences with the year round school, (2) format of present year round schools, (3) degree to which year round schools are accepted throughout the United States, and (4) major advantages and disadvantages of the year round school. Included are descriptions of 10 different plans for year round schools, an assessment of year round schools in general, an overall summary, and a bibliography of 59 sources. (Figures 3, 4, 13, 19, and 20 may be of poor quality in hard copy because of marginal legibility). (Author/LR)