PLAN is an ungraded, computer supported, individualized program of education. This paper discusses the development of this program year by year. The first two years were limited, both in curriculum and content pacing. The third year was much more comprehensive. The fourth year will involve all grades, and will have lessons which are behaviorally and discretely defined, information about students, and rules for the use of this information. A program of study is developed by checking state and local school system requirements, the students academic history, and the students academic foundations. A core content of the students program is then set up. At the secondary level, this program is aimed at providing the student with preparation for at least two major long term goals which have been decided upon by him and his parents. The examples given in the second booklet on using student performance data show the data upon which revisions of PLAN modules were made as well as student performance on the revised materials. By first examining summary results for all items for an objective, it is possible to determine whether or not the general level of performance if acceptable, and further whether results indicate general misconceptions or errors in the instructional material itself. (SJ)