[背景]我们都知道学习是师生互动的双边活动,任何一节课堂上自始至终都应该贯穿着学生的学和教师的教。课堂上,教师会对学生提出一系列的问题,正是在这些问题的思考和解答过程中,学生获得了知识,训练了能力,受到了教育。然而,课堂上,只有学生对教师提出的问题作出积极的思考和解答,才能及时地反馈信息,获得知识,提高能力。过去那种“填鸭式”的教师教什么学生就装什么的教学方法,已经严重影响了学生学习主动性的发挥,限制了学生主动思考问题的空间。理论和实践都告诉我们,课堂上只有 [Background] We all know that learning is a bilateral activity of interaction between teachers and students. In any class, students should learn and teach from beginning to end. In class, teachers will ask students a series of questions. It is in the process of thinking and answering these questions that students gain knowledge, train their abilities and be educated. However, in class, only when students actively think and answer the questions raised by teachers can they timely feedback information, acquire knowledge and improve their abilities. In the past, the teaching method of what the students put on to teach what the “spoon-feeding” teachers have seriously affected the students’ initiative in learning and restricted the space for students to think on their own initiative. Both theory and practice tell us that there is only in class