38 C.F.R. § 21.124
(a) General. A combination course is a course which combines training on the job with training in school. For the purpose of VA vocational rehabilitation, a course will be considered to be a combination course, if the student spends full-time on the job and one or more times a week also attends school on a part-time basis. A veteran may pursue the components of a combination course in the following manner:
(b) Cooperative course. A cooperative course is a special type of combination course which usually:
(4) Includes relatively long periods each of training on the job and in school such as a full term in school followed by a full term on the job.
(Authority: 38 U.S.C. 3104(a)(7))
[49 FR 40814, Oct. 18, 1984; 50 FR 9622, Mar. 11, 1985]