Declaratory Ruling #44, Book 5, D.o.E. App. Decision 33, states that a parent/guardian may not use dual enrollment to enroll a child in all courses but one. (E.g., a child could take 5 of 7 classes via dual enrollment.) Also, a secondary student may not enroll on a full-time basis in a post-secondary institution. Iowa Code section 261E.7(2); 281 IAC r. 22.4(1).