I wore a school uniform in part of my elementary schooling and all of my highschool years. We were allowed individual expression, such as different ties for the guys and scarves for the girls, etc. and we had frequent "dress down" days for charity. It used to bother me sometimes, getting dressed up every day, but I'd say it was more conducive to learning - kept you focused on why you were there - and on the whole, it was cheaper for parents, even though the component parts of a uniform were somewhat expensive. We also had the parent association provide funding assistance for families that couldn't afford the uniform and it was done without the students knowing.