1. Know the circle and know its shape characteristics.

2. Cultivate children's interest in the mathematical activities of cognitive graphics.

We can find round objects from many objects and the surrounding environment.

Activities to be prepared

1. Various round objects (such as round mirrors, disks, round biscuits, etc. ).

2. Courseware: Various shapes [2-54]

Teaching tool picture

Activity process

First, import

Briefing: "Children, there are some graphic babies in our class today. Let's go and have a look together? "

Show the children around the shops made of round objects and talk about their faces.

Summary: The faces of these objects are all round. So what kind of figure is round?

Second, expand

1. Every child has a circular card to guide children to observe and explore the shape characteristics of the circle.

Each child has a round card. Please touch it along the edge of the circle.

Q: How do you feel? Let the child touch the round face and ask: How do you feel?

The edge of the circle is smooth and the surface of the circle is flat, and the shape characteristics of the circle are preliminarily perceived.

Summary: The surface of a circle is flat, and the periphery is smooth and angular. Such a figure is a circle.

2. Observe the expansion and find the circle around you.

Please look for the circle around you: What is a circle in our classroom?

Have you ever seen a round object there?