怎样上好习题课呢?是每位数学教师都面临的问题。教师要有意识地创造民主、宽松、和谐的课堂气氛,使学生在良好的学习环境中感到无拘无束,畅所欲言,让课堂稍稍“乱”起来。下面是我在高二讲解一道例题的教学过程。这道例题是这样的:8个人排成一队,A、B、C三人中任两人互不相邻,D、E两人也互不相邻的排法共有多少种?教师:本题有两个限制条件:一是A、B、C三人中任两人互不相邻: What is a good exercise class? Every math teacher is facing the problem. Teachers should consciously create a democratic, relaxed and harmonious classroom atmosphere, so that students feel comfortable in a good learning environment, speak up, so that the classroom a little “chaotic” up. Here is my teaching example on a high school to explain a case. This is the case example is this: 8 individuals lined up in a team, A, B, C three people are not adjacent to each other, D, E two people are not adjacent to each other how many kinds of Pai law? Teacher: The title There are two restrictions: First, A, B, C two of three people are not adjacent to each other: