I had been looking for these, for the longest time.I have always known them as Project Folders. We use to use these for everything, at one of my Printing/ Graphic Art Jobs. They are great to keep projects together, clean, and protected. You can hang them by a tac, or a nail. Binder Clips.They file easily. You can add notes with a dry erase marker, and wipe them off.I am so happy that they found a new use for them. They are perfect for kids to use, for practicing letters, working on worksheets. eSee full review