To extend educational opportunities and services to everybody becomes increasingly more important, and correspondence teaching can carry education to those otherwise out of reach. Correspondence courses, whatever the subject, must guide, aid, train, and test the student. Although the instructor and the student do not meet, their written exchange arising from assignments is individualized and takes place over the full period of study. Encouragement is very important, particularly, at the beginning, when lack of confidence makes students most likely to become dropouts. There are many possible methods of combining other media with correspondence teaching to meet a variety of needs, and frequently oral teaching supplements regular correspondence. Use of programed instruction is now beginning in correspondence teaching, but this technique is not yet fully evaluated. Organizing correspondence schools requires certain basic functions, but each school must be built according to its specific situation and role. The costs of production must be carefully weighted so as not to impair educational standards. Appendices are included covering production and administration of courses. (OH)