(1) "Educational television and radio and distance learning" means programs for direct teaching and instructional enrichment which are transmitted for viewing, listening or interactive instruction in connection with instruction in public elementary and secondary education by state-operated educational television and radio stations or by program providers approved by the State Board of Education.
(2) "Direct teaching" means instruction primarily by educational television or radio or by live interactive transmission in a subject or course of study which is a part of the public school curriculum as authorized by the State Board of Education.
(3) "Instructional enrichment" means instruction by means of educational television or radio or live interactive transmission which is designed to improve, supplement, complement, or strengthen instruction in a subject or course of study which is a part of the public school curriculum. [1961 c.535 §2; 1989 c.285 §1]