I think most of us have to keep student data folders nowadays. Our district also wants us to give out weekly reports to the students. I keep both of them in these storage crates from Ikea. They are the perfect size to fit into the space that I have and stack very nicely.
If you would like a copy of my posters, just click on the picture below to get them from Google docs.
I noticed that it looks funny in Google docs, but when you download the pdf it is fine.