Ключевые слова: arm, blank, blue, board, chalk, chalkboard, class, clean, close, color, communication, concept, copy, copyspace, drawing, education, empty, female, green, hand, handwriting, holding, human, learning, lesson, message, note, pastel, people, person, primary, school, soft, space, student, symbol, teacher, teaching, text, texture, up, wall, white, work, write, writing,