美国著名的教育心理学家加涅认为教学活动“是为了促进学习而设计的”。如果我们不遵循学习需要而盲目地设计教学环节,就违背了教学的规律。课堂教学中,让学生集体活动过多,易导致大多数学生不动脑筋。如果教师提问,只须学生答出“对!”或“好!”之类的简单的答案,就体现不出问题的启发性和思维性;如果在教学中,只让学生单一地齐声朗读,就造成学生只听而不参与学习,这也是违背教和学的“双边”活动原则的。“抓两头,带中间”固然重要,但在课堂教学中只注 Gary, a famous American educational psychologist, believes that teaching activities are “designed to promote learning.” If we do not follow the learning needs of blind design of teaching links, contrary to the laws of teaching. Classroom teaching, allowing students to collective activities too much, easily lead to most students not brains. If the teacher asks a question, he or she simply asks the student to give a simple answer such as “yes!” Or “good!” , It causes the students to listen only and does not participate in the study. This is against the principle of “bilateral activities” of teaching and learning. “Grab two, with the middle” is important, but in the classroom teaching only note