Ключевые слова: black, blackboard, board, chalk, chalkboard, concept, conceptual, development, draw, drawing, educated, education, experience, expert, graduation, handwriting, idea, illustration, information, know, knowledge, learn, power, quality, reminder, school, science, skills, slogan, study, success, teach, text, trainer, training, tuition, university, word, work, write, writing, written,