Ключевые слова: back, background, blackboard, blank, child, childhood, children, class, college, colorful, communication, concept, creative, desk, development, document, education, handwriting, idea, kid, knowledge, laid, learn, learning, lesson, letter, lettering, letters, message, multicolored, notebook, object, office, pen, pencil, phrase, plan, ruler, saying, school, schoolchildren, set, space, strategy, student, study, supplies, symbol, text, typography,