1. Know semicircles, and know that two semicircles with the same size can be combined into a circle, and can be combined into various figures to draw various objects;

2. Develop children's imagination, creativity, observation ability and operation ability;

Activity preparation:

Six semicircles for each child.

Activity flow:

1. Show a semicircle and guide the children to imagine what it looks like. The child said, and then the teacher demonstrated with a semicircle on the blackboard. And add pictures. Let children feel the change of graphics. Stimulate children's interest in collage. Appreciate the teacher's semicircle collage work. Tell me what you found. How do you feel?

2. Guide children to discover that different sizes and colors can be used. Multiple semicircles are collaged together. And by adding pictures, the picture is more vivid.

3. Let the children do activities and make semicircles in groups (let the children think about what they want to collage first. Then operate. )

5. The teacher guides the tour, focusing on guiding the children to combine more than two semicircles to add pictures.

End of activity:

Show children's works. Individual children can be invited to introduce their works. The teacher made appropriate suggestions.

Teaching reflection:

Teaching activities based on children's understanding of graphics. Fully tap the favorable factors in teaching materials, perceive the relationship between plane graphics, and cultivate children's spatial concept. Children's works in this activity. Let me shine at the moment, each with its own characteristics, very rich, activities so that children have accumulated different aspects, different levels of experience, for the future study of graphics provides a good foundation. In teaching, we can evaluate classroom performance, knowledge mastery, work and rest habits in time, and also evaluate and encourage children's feedback in time after the test, and reward those who perform well with smiling faces or stickers to arouse children's enthusiasm. Give priority to encouraging praise.

The above is my analysis and elaboration of the design concept of the lesson "spell one spell one". Of course, teaching is a flawed art, so please give your valuable advice on the shortcomings! [elf children's website]