Ключевые слова: background, book, business, colorful, communication, concept, course, design, desk, education, elearning, evaluation, exam, experience, feedback, handwritten, illustration, improve, improvement, internet, knowledge, laptop, learn, learning, lesson, life, message, note, notepad, office, online, paper, question, review, school, sign, student, study, studying, summary, table, teach, technology, text, training, university, webinar, wood, wooden, workplace,