affirmative : be healthy improve mental health, develop team spirit , be proudof nation , reduce stress

negative : too tired to study  accident........

Affirmative: be healthy, improve mental health, develop team spirit, be proud of nation, reduce stress

Negative: too tired to study, accident, disappointment of losing, time wasting, lack of skilss

Paragraph

I think students should learn sports at school for some reasons. First, they can be free from stress when learning sports as they will forget bad things while focusing on learning outside. Also, learning outside helps them breathe in morning atmosphere. Second, learning sports at school helps students strengthen their health. Only by 45 minutes learning can we have a strong heart, beautiful muscles and a lower chance of getting high blood pressure and obesity. Last but not least, sports help students develop team spirit as they can learn how to cope with each other. In short, these are among the reasons why students should be taught sports at school.