Living in England, all school children wear uniforms. Sorry to have to disagree with a few posters, but I believe uniforms are a good idea. High schools serving a large area have a diverse mixture of pupils - very wealthy to very poor (I believe the very needy have financial help in purchasing uniforms). If there was no uniform, the underpriveledged children would, I believe, be visibly obvious, and this would make them disadvantaged.
Master Midwich has worn a school uniform since the age of 4. Now age 12 he attends the same school I attended. (Founded 1652).