Fashionable outfit ideas for High school?

Hi! I'm going into grade 9 next year. I'm going to be going to a huge outlet(s) in NYC this weekend. I need some ideas/fashion tips on some cute/fashionable outfits for high school. The high school I'm going to is really preppy, and i tend to have a preppy fashion as well, but yeah, 10 points for the best answer! Thanks so much!!