The central principles of Heuristic method is? A) Learning by doing B) Learning from past C) Learning through others D) None of these Related MCQs: The Oral Method is not a complete method itself? When two or more methods are mixed up for teaching, the teaching method will be known as? …… is psychological study of moral principles? Which of the following principles of curriculum development was adopted by Mulla Nizam-ud-Din Sahalvi?