Teaching practice has become programmable labor without man ' s involving since a long term ; and teachers ' thoughts are tied up by traditional teaching method when facing authorative textbooks ; so the students become machines absorbing knowledge passively . " subject losing " teaching has lost his own original meaning of teaching 教师和学生作为教学实践活动的两个主体是教学实践活动固有的性质决定的，但是长期以来，教学实践成了程序性劳动，教师面对权威的教材、教学方法束缚了自己的思维，学生则成了被动吸收的机器。
