How large should a school district be? The answer is similar to President Lincoln's answer to how long a man's legs should be: long enough to reach the ground. A school should be large enough to do the job, to provide the educational programs that meet the needs of its students. School size means different things to different people. A small school in Wyoming would be quite different from a small school in New Jersey. Recommendations for minimum school district sizes range from 400 to 10,000 students; optimum size may vary from less than 750 to 50,000 students. The answer to how large a school district should be is found by analyzing its educational programs and how they are to be delivered. Even if a district is small, alternatives for improving the educational opportunities for students are available. A small school district may reorganize, decentralize, or explore alternative curriculum programs. Cooperative music programs can be developed with other small districts and students shared to form bands or orchestras. Teachers in highly specialized subject areas might alternate between districts. Elementary grades might be combined. Correspondence courses, micro computer instruction, or use of television provide other alternatives. In addition to discussion of alternatives for enriching a curriculum, this monograph identifies some of the problems involved in defining and comparing school district size and reviews some of the research regarding school size. (Author/DS)