笔者发现,教师在设计课堂教学时,为了使课堂教学“顺利”进行,往往精心“设计”教学过程,自觉或不自觉地通过各种方式代替了(大多数)学生的思维,学生因此失去了在自主思考、独立分析、解决问题的过程中,获取数学思想方法、积累数学活动经验的机会。现结合几种典型案例浅作分析,望得到同行指教。一、不必要的铺垫代替学生的思维【案例一】新知学习前的复习铺垫除数是小数的除法的教学,先复习了除数 The author found that in the design of classroom teaching, in order to make classroom teaching “smooth”, teachers often carefully “design” the teaching process, consciously or unconsciously replaced the thinking of most students by various means, Students thus lose the opportunity to acquire mathematical thinking and methods and accumulate experiences in mathematical activities in the process of independent thinking, independent analysis and problem solving. Now combined with several typical case analysis, hope to peer advice. First, the unnecessary bedding to replace the thinking of students 【Case A】 Learning new knowledge before matting divisor is the division of decimal teaching, first review the divisor