Slide these handy Primary Side-Loading Dry Erase Pockets over a document magazine or book and write or highlight without damaging your surface. Opens from top and side for easy use. Great for taking notes in the classroom allowing multiple students to complete a workbook studying and teaching. These dry erase sleeves include red yellow green and blue. Plastic. 10" x 13" “I'm always looking for ways to reuse products. I love the dry erase sleeves because they are so versatile. You could add worksheets and use them in centers or small groups or even teach highlighting information in stories.”