Blackboards; Chalk; Blackboard erasers; Blackboards, drawing boards and easels; Book plates; Calligraphy ink; Dry erase writing boards and writing surfaces; Educational kits sold as a unit in the field of education consisting primarily of printed instructional materials and also including audio CDs; Manuals in the field of instructional math; Marking pens; Painting palettes; Polyester film for use as a paper substitute for dry toner xerographic imaging, namely, laser printing, color copier pr...