Triangle is a kind of figure that students contact more on weekdays. The important and difficult points learned are all obtained by students in operation, not imposed on them by me. Only in this way can students actively participate in learning and the effect will be good. In the whole class, I just play the role of participant and guide. Class summary is also my guidance and students' summary, so the effect is better than the teacher's arrangement. As can be seen from this lesson:

First, effectively stimulate students' interest and promote their active participation.

Starting with students' life, let students feel the close connection between triangle and life, thus stimulating students' enthusiasm for learning triangle and changing "I want to learn" into "I want to learn".

Second, change the way of mathematics learning and guide students to experience the process.

Learning is not only the pursuit of a perfect conclusion, but also an experience, which requires students to experience, perceive, recognize and learn by themselves. "Triangle Classification" is the key and difficult point of this course, so students should be given enough time and space to fully operate, perceive, think and communicate, so that students can collide with their thinking in communication and promote the development of their thinking.

Third, make scientific evaluation in time to encourage students to develop in an all-round way.

The main purpose of evaluation is to "stimulate students' enthusiasm for learning and promote their all-round development". "Therefore, in the evaluation process, I pay attention to using a variety of evaluation methods to evaluate and encourage students' performance in a timely manner, so that students can establish a sense of self-identity and make clear the direction of efforts.

I wish you happiness.