Before starting instruction a teacher should
(a) Know the existing knowledge of his students and their background knowledge
(b) Be aware of the environmental variables acting on the mind of the pupils
(c) Be competent enough to arouse the curiosity of his pupils
(d) all of the above
(a) Know the existing knowledge of his students and their background knowledge
(b) Be aware of the environmental variables acting on the mind of the pupils
(c) Be competent enough to arouse the curiosity of his pupils
(d) all of the above