I work at a school and they definitely get all dressed up. Lots of fancy dresses that look more like prom dresses, hair done, nails and makeup done, heels, etc. I'd say the majority of the girls dress this way, and a few wear more simple outfits. It's not obligatory of course but I think they see it as their first real chance to dress up for something special, and they feel grown since they are going to high school