有的学生已经学完了初中课程,但问他什么数是有理数,三角形的内心与三角形的垂心有什么不同,如何寻求三角形的内心和外心?他们往往目瞪口呆,答不上来。在课堂上,学生也最怕提问概念性的问题。这是因为他们只凭公式记公式,翻开书照例题作习题,有关概念的内容一概不管,或者以略知为满足。这就要求教师重视数学概念的教学。数学概念就象开大门的钥匙,没有这把钥匙大门就打不开。怎样才能把打开数学大 Some students have already completed the junior high school curriculum, but ask him what numbers are rational numbers. What is the difference between the triangle’s inner and the triangle’s heart? How do you seek the triangle’s inner and outer heart? They are often stunned and cannot answer. In class, students are also most afraid of asking conceptual questions. This is because they only use the formula to remember the formula and open the book as an example. The contents of the relevant concepts are not satisfied, or they are satisfied with a little knowledge. This requires teachers to pay attention to the teaching of mathematical concepts. The concept of mathematics is like the key to open the door. Without this key, the door cannot be opened. How can I turn on mathematics