I agree that students should wear school uniforms because wearing uniforms can make their minds clear. They can concentrate and think about school work better.
It is the same thing when you wear a uniform for sports. For example, if you wear a baseball uniform, you think more about the game and you are more comfortable. So, it's easier to play.
But some people may disagree to wear uniforms because they feel stiff and formal. They might like to wear other clothes. Some people don't want to wear uniforms because they are expensive.