Ключевые слова: back, backboard, background, blackboard, board, book, bookshelf, business, chalk, children, class, classroom, cognition, college, concept, cover, crayons, design, desk, drawing, elementary, equipment, green, homework, learn, library, literary, literature, notebook, object, office, old, paper, pen, read, school, science, september, shelf, spine, student, study, supply, table, teacher, textbook, university, wall, wisdom,