I love these storage boxes from Sterilite. The largest one can be used with hanging file folders. The other sizes are handy to for organizing manipulative's and supplies. A bonus is that they are stack-able. They are pretty affordable too, usually about $5 for the large size, a few places have had them for $8 which is still a pretty good deal for their versatility. The largest one measures 14 1/4"L x 9 1/2"W x 12 1/4"H
You could storage up to a 1 1/2 inch binder in them and still get the lid closed.
This is how I use them:
Sorry the labels aren't all pretty and crafty...we are all about not giving into perfection here.
I store them on an old rolling utility cart.
I find it very helpful and the boys like not having to look all over the house for their school work.
Got any other great products you use to keep you homeschool or office organized?