Ключевые слова: above, abstract, art, background, blackboard, blank, chalk, chalkboard, classroom, closeup, communication, design, desk, detail, dirty, drawing, dust, education, empty, handwriting, learn, lesson, nobody, object, pattern, piece, rough, school, sketch, student, study, supply, surface, teach, template, texture, tool, top view, trace, training, unclean, university, used, white, write,