16 EDUCATIONAL AND TEACHING MATERIALS, NAMELY, WORK BOOKS AND ACTIVITY BOOKS FOR TEACHING MATHEMATICS AND READING; ACTIVITY KITS, NAMELY PACKAGES OF PRINTED FORMS; CHARTS, WORK SHEETS, INSTRUCTION MANUALS, PICTURES AND OTHER PRINTED MATTER FOR USE IN TEACHING VARIOUS SUBJECTS; PAPER PRODUCTS AND SUPPLIES FOR USE IN SCHOOL INSTRUCTION AND ADMINISTRATION, NAMELY, BLANK AND PRE-PRINTED PAPER IN ROLLS AND SHEETS, FILE FOLDERS, BLANK AND PRINTED CARDS, POSTERS, CALENDARS, DIARIES, BLANK AND PRINTED MEMO PADS, MEMO BOOKS AND NOTE BOOKS, ENVELOPES, LABELS; DUPLICATING MASTERS, NAMELY PRINTED PAPER USED FOR REPRODUCING BY MEANS OF THERMAL DUPLICATING MACHINES; ROUND PLASTIC DISCS USED TO TEACH COUNTING; ARTIST'S PAINT BRUSHES