The Escuelas "Sabatinas" (Saturday Schools) program in Costa Rica will be for adults 18 and over who wish to obtain a primary school diploma on the basis of maturity, and who have enough general knowledge, intelligence, and maturity to undertake independent study supplemented by formal instruction. The course will run two years, 36 weeks a year, with a four hour session once a week. Instruction in Spanish, mathematics, social studies, science, and human development will be accompanied by social and cultural activities. Magazines and radio will be used extensively to complement classroom work and outside assignments. Such criteria as economy and flexibility will be used in choosing textbooks. Advantages of the program for students and teachers, and in terms of administration, are expected to be considerable. (The document includes an estimate of teachers and students per school, estimated cost of materials, and educational census data.) (LY)