C-Line Reusable Dry Erase Pockets make learning fun. Simply insert a sheet of paper and use a dry erase marker to write on the pocket. When the lesson is completed, easily wipe the marker off the pocket and use again. The dry erase pockets work with all 8 1/2" x 11" paper. They are also economical and environmentally-friendly, because they eliminate the need to copy multiple worksheets over and over again saving you time, money and paper.