As the mom of two teenaged girls, I'd love uniforms. It's an equalizer between the classes, which is greatly needed at this age. So much animosity between kids these days, with "You aren't as good as me because you don't have "blah blah blah" clothes." I like how uniforms take the focus off of how much money someone has, and at least tries to put the focus on academics.
Plus, holy guacamole, I just paid almost $1,000 for school clothes for 2 girls, and they didn't even get a lot - 5 pairs of pants/jeans each, 5 shirts each, a pair of sneaks each, a pair of sandals each, a 6-pack of socks each, a package of undergarments each, and that's it. $1,000. That's not including school supplies, $800 a year for lunches, and everything else.