有不少老师在评价一堂课的教学是不是符合课改理念时说,演示实验在课改中应尽量做到不用,否则就不能很好地体现学生的自主探究理念。我不赞同这种观点。譬如说,二年级科学课学“杠杆尺”,农村学生在课前很少有什么是杠杆尺及杠杆尺怎样才叫做平衡这方面的感性知识,所以上课时首 There are many teachers in the evaluation of a class of teaching is not in line with the concept of curriculum reform, demonstration experiments in the curriculum reform should try not to use, otherwise they can not be a good reflection of the students' concept of self-exploration. I do not agree with this view. For example, the second grade science class “lever scale”, rural students rarely before the class is the lever and lever scale how to call this balance of sensory knowledge, so the first class