Ключевые слова: advertising, back, background, blackboard, blank, board, chalk, chalkboard, class, classroom, college, communication, copy, dirty, draw, education, empty, exam, greeting, holder, homework, information, knowledge, learn, learning, lesson, pencils, room, school, schooling, scratched, space, start, stationery, student, study, studying, supplies, table, teach, teacher, teaching, term, text, texture, university, welcome, wooden, write, year,