Here is a pic of uniformed girls in Peru. I´ve got plenty of them. And the interesting thing is that they are forbidden to pull down the straps, and are punished if so. I´ve got a friend of mine, a girl from Peru who has told me these stories.
	And here´s two pics of a uniform some girls in Colombia have to wear. (Though the pics are small, you can just see they're skortalls, short overalls with a split skirt.)

I´ve got an article that I wrote in Spanish for a bondage site about these uniforms. Read the English translation.

And here is a nice overalls story for the moment: Owned Teacher . (Note from Carg85: this is a pretty explicit and abusive story, and you shouldn't read it if you're not an adult.)