怎样才能上好一节数学课?从实践中我认识到,最重要的是教师必须深入钻研教材,认真备课,做到中心明确,才能抓住四十五分钟精讲多练,提高教学质量。下面以“平行四边形的认识和面积”这一课为例,就我在备课和教学过程中的指导思想和具体做法,谈一点粗浅的体会。 How can we take a good math class? From practice, I realize that it is of the utmost importance that teachers should study materials in depth, prepare lessons carefully and make the center clear. Only in this way can we grasp the 45 minutes of intensive training and improve the quality of teaching. Take the lesson of “Understanding and Area of ​​Parallelograms” as an example, let me briefly discuss my guiding ideology and concrete practice in lesson preparation and teaching.