I think of large three piece boards like these as bread boards, but clearly this was used as a drawing board in a school, with the cumulative marks and notes and drawings of many different students spread across its surface on both sides. I find the cumulation pretty fabulous (I especially love that the word "cookie" appears not once but twice) and think it should definitely be added to some more!
26" x 20" x 7/8" and in very good, much used condition, solid and sturdy and wonderfully warm, with many years left in it.