Do you barrack for a sports team? Your team wears a special uniform to identify them. When you go to watch them you may wear part or all of that uniform too. It identifies you as a supporter.
Having a school uniform gives you an identity too. It means that you belong in that particular school. You are part of a special group of people and you are seen to belong in that group.
Having a school uniform is also good because:
hat, top, pants, shoesYou don't have to worry about what to wear on a school day.
You know that everyone else will be wearing school uniform.
You can save your 'good' stuff for nights and weekends.
The clothes are usually practical and comfortable to wear.
Uniforms can be handed down to other kids in the family.
You can sell or buy second hand uniform at the school.
With a uniform you have got most of the clothes you need to wear so you don't need as many casual clothes, and if you are growing quickly that will be a big saving for mum, dad or whoever buys your clothes.
It promotes equity because everyone has to wear the same.
playing sportThere is less pressure on kids to wear the latest fashion, which may not be suitable for wearing all day.
Most primary schools don't have change rooms or showers, so there is nowhere suitable for changing into sports clothes for sports lessons. So, casual and comfortable clothes that can be okay to wear when doing anything at all are best.