1, through the comparison of ellipse and circle, understand the characteristics of ellipse and master its name.

2. You can find elliptical objects in your life.

3. Cultivate children's observation and judgment through jigsaw puzzles.

Activity preparation:

1. The child has 1 pieces of circular and oval paper, and the short diameter of the oval paper is equal to the diameter of the circle!

Activity flow:

First, the teacher shows the puzzle.

1, the teacher shows the oval puzzle to guide the children to observe.

Division; Look, children, what kind of figure is this? Have you met?

2. Open the puzzle to guide children to observe. What is the ellipse?

Teacher: Please see which shapes this ellipse can be broken down into. (Put the compositions in turn.

The oval is displayed in front of the children.

3. The teacher shows the ellipse. Ask the children to observe it. Q: Do you know this figure? Think about it. Yes

What characters are similar to him? (Guide the children to say the circular pictures).

Second, know the ellipse.

1, let the children compare the circular and elliptical pieces of paper and find that the ellipse is longer than the circle.

Tell your child that this long circle is called an ellipse.

2. Let the children fold the circular and oval pieces of paper in half up and down, open the left and right halves respectively, and measure with a stick to see if the left and right prints are the same length, and come to the conclusion that the circular pieces of paper are the same in length, and the oval pieces of paper are one long and one short.

3. Show several different figures at the same time, and let the children decide which one is oval.

Third, guide children to combine their own lives and think that what they see is oval.

1, please think about where you have seen such an oval.

Fourth, puzzles.

1, let the children spell out the ellipse with the puzzle. Let's see who spelt hungry, correctly and quickly. Talk about what graphics you used in the puzzle!