1. Activity Objectives:
1. Based on learning how to use square paper to make pinwheels, boldly try to use a variety of ordinary chart papers to make pinwheels. windmills.
2. Be able to perceive the relationship between the structure of the windmill and its rotation, and understand the principle of rotation of the windmill.
2. Preparing for the activity:
1. Several finished paper pinwheels of different shapes.
2. Several colored papers with various regular graphic shapes.
3. Auxiliary materials: straws, plasticine, scissors, glue and pins.
4. Organize the venue: windmill exhibition.
3. Business Process:
1. Provide various finished windmills and the teacher plays with them to arouse children's interest in making.
2. Observe the windmill, analyze the materials and production methodsand guide the children in making it.
Children, let's look at what is on the windmill and what we call them (windmill blades, windmill poles, windmill shafts) and talk about it together (children's response).
1. Taking the square paper windmill as an example, teachers and children discuss and analyze the methods of making windmills.
2 children try to do it.
3. Try using other paper shapes to make windmills and explore which paper shape is most suitable for making windmills.
Assign a task: let the children become the little doctors of the windmill. Please use your brain: Why is the windmill spinning? And some children's windmills can't spin? What shape of paper windmill will spin and why? Then, quietly tell the teacher the secret thatand you discovered. Are you ready, children? Bring all kinds of windmills we made and let's go!
3. Play with windmills outside and the teachers will give you tips.
4. Teachers and children share their discoveries together.
Kids not having fun? (Children's responses) The teacher asked a few children who were not having fun to talk about the problems they were having.
Xiao You: "Master, my windmill will not turn even if I run..." Guoguo: "Master, my windmill always collapses..." Pengpeng: "Master, my windmill only spins once I move it, but it won't spin if I don't move it..." Teacher: "So have you tried running or spinning in circles to help him turn? Peng: “Yes, it just doesn't turn?”
Teacher summary: If the windmill wants to turn, it must first ê.Be made of symmetrical paper, so that the two sides of the windmill can be balanced, so that when the wind blows, the wind force is equally strong on both sides. It will start to spin, and if your windmill is symmetrical and you haven't started spinning yet, it is possible that when making the windmill the child cut the blade line too far , and this should happen. There is more space around the center point. There are certain positions for children when attaching the windmill. The pins are attached too far and need to be moved further to make the blades look bulging and loose.