Tomorrows the first day of summer school?

Girl, you crazy haha. Summer school isn't a big deal when it comes to looks. If you like your hair scrunched and it's comfortable for you, go for it. I would always bring a small notebook and a pen with you. A band shirt would be fine. It's summer! Just be comfortable! And for the shoes, follow your school's normal dress code. Then you can ask your teacher when you get there if the rules are different. Just play it safe for your first day.