Two folders 

Three, wide ruled spiral notebooks, around 100 pages each (don't pay extra for fancy covers - they'll get covered up) 

One, three-ring binder (it doesn't need to be big - the one inch size should have plenty of room)

One set of dividers for the binder (the set of dividers should have at least six)

A tool box to help stay organized

Pens for checking papers (any color they'd like, except yellow)

Pencils - lots of pencils (any brand is fine, but I've found the Dixon Ticonderoga pencils tend to sharpen better)

Markers 

Glue stick (I will provide liquid glue, but most students prefer sticks)

Highlighters  

Dry erase markers 

Personal headphones (labeled with their name)

A coffee mug for cocoa and tea (don't buy something new - an old mug is perfect)

An unbreakable, refillable water bottle

Non-marking gym shoes

Additional supplies students have found useful in the past:

Pencil top erasers

Pencil grippers

A shelf for the bottom of the locker (that way they have room for their boots as well as other items at the bottom)

Don't worry about getting scissors (unless your child is a lefty), crayons or colored pencils. I have lots of these available in the classroom for the students to use. :)