16 Printed material, namely, books, magazines, wall charts, workbooks, instructional books, posters, teaching manuals and pamphlets featuring instruction in languages, mathematics, and science; printed material, namely, books, magazines, wall charts, workbooks, instructional books, posters, teaching manuals and pamphlets in the field of testing and assessment of aptitude and skills in languages, mathematics, and science; printed material, namely, instruction manuals and guides used in association with interactive educational games, game software and online interactive educational activities