Ключевые слова: accessory, background, black, blackboard, blank, board, chalk, chalkboard, chalks, class, classroom, clean, color, colorful, copy, dark, draw, duster, education, element, elementary, empty, equipment, eraser, group, highschool, learn, learning, lesson, many, nobody, object, piece, pieces, school, set, simple, space, stick, study, studying, surface, table, teach, teaching, text, wooden,