英语topic:should middle school students be required to wear uniforms?

Yes. Firstly, it tells you you are a middle school student, So, do what you should and behave yourself properly.
Secondly, reminds you that you belong to that party (the school), a particular party, so that you can observe the rules of the party and be proud of yourself school and yourself, thus, the self-esteem is established.
Finally, the unifrom can enhance the team-work. You wear the same uniform, you share the same resources, you are all eaqual to each other. As a whole, each of you belongs to whole system, and you have to work altogether to make it perfect.

Different people may have different opinions on one matter. For reference only.