In your opinion, does wearing school uniforms increase learning?

I strongly believe that school uniforms do not impact academic performance. However, I'm not outright against them for several reasons. First, they create a firm boundary between "school life" and "personal life" because by wearing different types of clothing, both settings feel like a different type of environment. They also make the school look more prestigious to a passerby because every student looks preppy; you wouldn't be able to distinguish the different social groups like the "stoners" or the "thots", which is important for a private school wanting to attract wealthy parents who don't want their child to be associated with "others." Also, by enforcing a uniform, a school can exercise even more control over a student's decisions, further nurturing the conformity that is essential for controlling a population. All of these reasons are valid, but they seem to be only beneficial for the school itself, not its students'.

Let's debunk a few defenses people use for uniforms. A common one is that they're less distracting, especially for boys. This is invalid for two reasons. Firstly, everyone's seen the "sexy schoolgirl" character, right? School uniforms are seen as kinky for many people. This most likely is because of the innocence that the outfit portrays, giving men a fantasy of corrupting this poor, sweet girl. The sexy schoolgirl, which was born out of being unexpected, has ironically become a total cliche. Also, even with very conservative uniforms, cute girls are still going to be cute. You can't stop them. Teen boys are always going to be distracted by girls, and the answer is not to stifle these girls for the sake of the boys, but to teach these boys how to control their desires, because the same temptations are going to be around for their whole lives.
Another excuse is that it saves hassle in the morning and frees up students' brain space to focus on academics instead of fashion. Now, I can't speak for other parts of the country, but in Silicon Valley where I attend high school, fashion is something only a few care about. Most girls have a "uniform" of their own, which is simply a t-shirt with leggings. Boys generally wear a t-shirt with shorts. I've talked to students who chose to dress this way (which is nearly everyone), and they don't put any thought into this outfit each day, which is exactly what uniforms claim to do. Instead of taking fashion away from students who love it, a better solution would be to stop expecting busy women to be fashionable. Again, once high school ends, people aren't going to have someone tell them what to wear each day. Students who don't particularly care about fashion must learn eventually how to dress themselves in a way that's comfortable, time efficient, and is appropriate for their environment. The only reason fashion is a "distraction" instead of a hobby is because it's culturally forced upon women who couldn't care less. We shouldn't be having a problem with a person wearing the same outfit every day, as long as that's what they want to do. That, not school-issued uniforms, will let students focus on their schoolwork while feeling comfortable and confident too.