Ключевые слова: background, black, blackboard, board, chalk, chalkboard, class, classroom, college, course, desk, draw, drawing, drawn, education, educational, font, greenboard, hand, handwriting, handwritten, knowledge, language, learn, learning, lesson, letter, message, school, schoolroom, sign, sketch, spanish, speak, studies, study, studying, symbol, table, teach, teaching, text, type, university, white, wooden, word, write, writing, written,