I think school uniform is good, although I didn't like to wear it.
When children are wearing school uniform they are not feeling difference in social ladder and can more concentrate on study. Now I understand it.
What are the pros and cons of children having a school uniform?
I think a school uniform is good (...is a good thing, ...is a good idea), although I didn't like wearing one ("it" refers to your school uniform, "one" refers to school uniforms in general).
When children are wearing a school uniform, they are not feeling different in terms of social status and they can concentrate more on their studies. Now I understand it.
Это хорошо. Я понял всё.