If you are planning on getting your school supplies early... These are the materials you are expected to have with you every class:
A 3 ring binder. I recommend that you get a 1"-2" binder for your science materials
Either a science notebook or loose-leaf paper to put into your binder.
Your agenda book
Your homework
A calculator when necessary (what ever calculator you used for Math last year would probably be fine)
Pens and/or pencils
You DO NOT need to bring your textbook to class every day... it is a resource that you can leave in your "Home work Spot" at home.