I insist on burning dreams!

The goal is far away, but it will come eventually!

The target is 100 books in 3 years.

Perseverance, it will take a long time to smell [roses]

Punch date 188 20220 107

Bibliography 2 1 Classic Course for Primary School Mathematics Teachers

Author Wu Zhengxian, Zhong Jianlin,

Publishing Education Science Press

Page 368

Progress 159 ~ 172

Teaching Design of "Understanding of Circle"

I. Overall feeling

In contrast with straight lines, we can feel the beauty of roundness, fullness and symmetry. Create suspense, why the circle is the most beautiful!

Second, get to the bottom of it

Draw a circle and realize that the beauty of a circle comes from its characteristics-the length is the same! This process includes all the knowledge and skills to understand the circle teaching: how to draw a circle, what are the radius and diameter, their number and their relationship.

Third, communication and contact, expansion and extension.

Open the boundary between straight and curved, and interpret the beauty of countless circles with the same length!