Ключевые слова: abstract, ancient, background, billboard, blackboard, chalk, childhood, childlike, class, classroom, college, color, communication, conference, copy, desktop background, dirty, drawing, education, elementary, eraser, exam, green, grunge, learn, lesson, noticeboard, old, paint, primary, reminder, school, space, studio, teach, teacher, texture, used, wall, white, write, yellow,