Keeping sketching affordable and in the classroom! That is SketchforSchools mission, and now with the latest and most affordable sketchbook. The Square-Back sketchbook is 9 sheets, 18 pages, with a 14 point blank cover is the most affordable sketchbook, and perfect for teachers, or camps that only have their kids a short period. The square back, much like a square-back magazine, but with no glue. The pages are held together by two stitches.