Scientific Calculator- I am recommending Casio. (There are many Casio calculators but choose the one with the orange buttons.) It's easy to use and will be great for Geometry the following year. The cost is about $13.
3 ring binder for notes
Loose leaf paper
Small package of sheet protectors. (will need no more than 10)
Low odor Black Expo markers and an eraser (for individual whiteboards- these will be provided)
All of the supplies above are for your child.