Ключевые слова: accessory, background, black, blackboard, blank, board, book, chalk, chalkboard, class, classroom, cognition, concept, copy space, desk, educate, education, educators, elementary, empty, equipment, green, homework, indoor, interior, knowledge, learn, library, literature, mock, modern, nobody, notebook, old, rendering, room, school, space, stack, student, study, studying, supplies, table, teacher, university, up, wall, white, wooden,