Ключевые слова: advertising, background, billboard, black, blackboard, blank, board, chalk, chalkboard, childhood, class, classroom, college, communication, concept, copy, drawing, education, empty, exam, female, frame, green, handwriting, knowledge, learn, learning, lesson, message, montessori, note, old, school, space, student, study, studying, symbol, teacher, teaching, text, texture, university, used, waldorf, white, write, writing,