Ключевые слова: black, blackboard, board, chalk, chalkboard, class, classroom, college, concept, course, desk, draw, drawing, educate, education, font, graduate, green, greenboard, hand, handwriting, handwritten, high, intermediate, junior, knowledge, learn, learning, lecture, letter, lettering, middle, nobody, school, secondary, sketch, studies, study, studying, table, teach, teaching, technical, text, training, understand, white, word, write, writing,