| Inhalt | "20% of what is listened to is remembered, 30% of what is seen, 50% of what is seen and heard, 70% of what is said by oneself, 90% of what is done by oneself. Instructors should break down the object of their lessen into different parts forming a series, the relative importance of which would then be determined." (The Film Section of the Information Service of OECD (Hg.): Catalogue of Technical and Scientific Films. International Film Reference Library of the Organisation for Economic Co-operation and Development. Paris 1966, S. 12) |