Ключевые слова: black, blackboard, board, categorize, category, chalk, chalkboard, class, classify, classroom, coaching, college, course, desk, draw, drawing, educate, education, educational, font, greenboard, hand, handwriting, handwritten, junior, knowledge, learn, learning, lecture, lesson, letter, lettering, nobody, rank, school, sketch, study, studying, table, teach, teaching, technical, text, type, understand, university, white, word, write, writing,