1, so that students can deepen their understanding of the relevant knowledge of the score in the process of measuring the rebound height of the ball.

2. Let students cooperate with others to complete practical activities in the process of activities, and enhance the sense of cooperation.

3. Let students experience the fun of activities and cultivate good learning mood.

Teaching process:

First, the introduction of new courses.

1. Students in physical education class like to play ball. Today, we will play ball with math knowledge. Are you interested?

Second, guide the inquiry

1. What happens when these balls fall from a height? Under normal circumstances, will the rebound height of the ball exceed the falling height? (blackboard writing: rebound height and falling height)

2, the teacher action demonstration, students observe the ball falling process, ask: What problem did you think of?

What's the rebound height? Is the rebound height and elasticity of the same ball the same? Different balls have the same rebound height and elasticity?

Third, the experimental operation with problems

1, learn the schematic diagram in the book, and tell the experimental steps and precautions.

Collective communication blackboard: set (falling height): 100 cm, 150 cm, 180 cm.

Descending: Note that the top edge of the ball is flush with the height mark.

Observe, mark and measure: pay attention to the whole centimeter.

Group calculation and discussion.

2. Division of work among team members: ball dropping personnel, measuring personnel, observing personnel and recording personnel.

3. Experimental operation.

4. calculation.

5. Group discussion. (Hint: Turn the score representing the relationship between the two into a decimal proportion. )

Summary: the rebound height of the same ball is different when it falls from different heights, but the score indicating the relationship between the rebound height and the falling height of the same ball is roughly the same, that is, the elasticity is the same.

Fourth, the second cooperative experiment

1. Students cooperate in the experiment again.

2. Calculation results

Step 3 discuss

4. Summary after collective discussion:

Different balls fall from the same height, their rebound heights are generally different, and the scores indicating the relationship between the corresponding rebound heights and the falling heights are naturally different.

5. Do you know?

1, read independently.

2. Tell the main reason for the change of ball rebound height.

3. Calculate the rebound height of the basketball used in the game, which is about a fraction of the falling height?

Summary of intransitive verbs:

Talk about your gains in this class.