课堂教学效率的提高要受到三个因素的影响和制约：一是学生接受知识能力的限制；二是教师输出知识量的限制；三是教学时间的限制。课堂教学实行目标教学，可以使课堂教学效率提高到最大极限。所谓目标教学，就是在每一堂课的教学中，根据学生的认知水平，接受能力，教师制定好 The improvement of classroom teaching efficiency is affected and restricted by three factors: one is the limit of students' ability to accept knowledge; the other is the limit of teacher's output of knowledge; the other is the limitation of teaching time. The implementation of the target teaching in classroom teaching, classroom teaching efficiency can be increased to the maximum limit. The so-called goal of teaching, that is, in each class teaching, according to the cognitive level of students, to accept the ability of teachers to develop a good