Activity background and design intent:
This activity focuses on understanding ellipsis. There is a difficult order for children to understand plane graphics, and the more consistent views are: circle, square, triangle, rectangle, semicircle, ellipse, trapezoid and so on. It is not difficult to find that the ellipse is difficult to understand, mainly because there is less contact in daily life. The math goal of our middle class next semester also requires children to know ellipses. As it happens, we are carrying out the theme activity of "Spring is coming". In the spring scene, we can find many objects with elliptical geometric figures, such as the petals of peach blossoms, the leaves of willow trees and the bodies of butterflies. Can let children know the ellipse in spring scenery. So combining these contents, I designed this math activity.
Activity objectives:
1. Know the ellipse in speaking, looking and looking, and perceive its basic characteristics.
2. Feel the joy of everything changing in spring.
3. Stimulate children's interest in learning, experience the happiness of mathematics activities and feel the fun of collective activities.
4, like math activities, willing to participate in various arithmetic games, and cultivate rebellious thinking.
Activity preparation:
1, spring background wall, spring girl picture, graphic butterfly, telephone booth, footprint sticker.
2. Music "Where is Spring".
Activity flow:
First, the secret of spring (paying attention to value: paying attention to the changes in the surrounding environment and feeling the joy of all things changing in spring).
1, t: We have a guest in our class today. Look! (Showing Miss Chun's photo) Who is she?
Spring came, Miss Chun came back and opened a spring telephone booth. Tell the secret of spring to people around you by phone every day. You are welcome to call and tell people around you more about the secrets of spring.
→ Children can imitate phone calls at will.
2. Teacher's summary: Spring is really a beautiful season.
Second, the secret of the butterfly (pay attention to value: perceive the characteristics of the ellipse by observing and comparing. )
1, t: Teacher Chun said: Your eyes are really bright. Thank you for calling me to tell me so many secrets of spring. I also brought a friend here today. Please guess who she is.
Riddle: Two beards on the head, wearing flowery clothes and flying flowers inside, happy and carefree.
(Imitating a butterfly) I have a question for you. What do you know about me?
→ Children communicate freely.
Do you know what shape my body is? Comparing the circles, what do you find?
(Guide children to overlap the two figures and compare them to confirm that the ellipse is longer than the circle. )
3. Teacher's summary: It turns out that the butterfly's body is oval. Compared with a circle, an ellipse is longer and flatter. We call a long and flat circle an ellipse.
Third, the game-printing footprints (focusing on value: consolidating the understanding of ellipses)
1, t: Please look for it in Miss Chun's friend. Where is the oval? Leave your little footprints.
2, music, children operate on the theme wall, interact with the guest teacher, tell the guest teacher where you found the oval of Mr. Chun's friend.
Activity expansion:
Combined with the database, let children find more oval objects in their lives and consolidate their understanding of graphics.
Activity reflection:
1. Activities should be subject to circumstances. Use telephone games to encourage children to recall their appearance experiences and boldly express the secrets of spring they have discovered; Guess the friend of the girl in spring, find the ellipse on her friend, let the children carry out activities in a complete scene, and let them feel the joy of the growth of everything in spring.
2. Activities should be interactive. Calling is an interaction between teachers and students and between students; Comparing the similarities and differences between ellipse and circle is the interaction with materials; Finding elliptical friends is an interaction with the classroom environment. Interactive learning helps to stimulate children's learning initiative.