课堂教学为什么要提问?问什么?怎么问?何时问?都是以教育心理学的原理为依据的,一为激发情趣,调动积极性;二为唤起注意力的集中,更好地组织教学;三为增进识记,减缓遗忘;四为提高教学效果,促进能力的培养. Why should classroom teaching ask questions? What to ask? How to ask? When to ask? Are based on the principles of educational psychology, one to stimulate interest, to mobilize enthusiasm; Second, to arouse the concentration of attention, to better organize teaching; The third is to enhance memorizing and to slow down oblivion; the fourth is to improve the teaching effect and promote the cultivation of the ability.