38 CFR § 21.129 - Home study course.
(a) Definition. A home study course is a course conducted by mail, consisting of a series of written lesson assignments furnished by a school to the student for study and preparation of written answers, solutions to problems, and work projects which are corrected and graded by the school and returned to the trainee.
(b) Limitations on inclusion of home study courses, in rehabilitation plans. A veteran and his or her case manager may include a home study course in a rehabilitation plan only when it supplements the major part of the program. The purpose of the home study course is to provide the veteran with theory or technical information directly related to the practice of the occupation for which the veteran is training.