Ключевые слова: abstract, background, black, blackboard, business, chalkboard, character, chart, class, classroom, communication, computer, concept, course, courses, design, desk, distance, education, elearning, flat, graphic, green, home, illustration, internet, knowledge, laptop, learn, network, online, pc, people, school, student, study, teach, teacher, teaching, technology, text, training, tutorial, university, video, web, white, wide, workplace,