16 Blackboards; Clipboards; Drawing boards; Drawing instruments; Dry erase markers; Dry erase writing boards and writing surfaces; Erasers; Magnetic boards; Packaged kits comprising printed instructional, educational, and teaching materials for educational activities in the field of mathematics; School supply kits containing various combinations of selected school supplies, namely, writing instruments, pens, pencils, mechanical pencils, erasers, markers, crayons, highlighter pens, folders, notebooks, paper, protractors, paper clips, pencil sharpeners, writing grips, glue and book marks; Stationery; Whiteboard erasers