Ключевые слова: academy, adult, age, background, caucasian, class, classroom, college, communication, computer, course, department, desk, education, equation, explain, explaining, female, giving, happy, indoors, intelligence, knowledge, laptop, learn, learning, lecture, lesson, marker, middle, notebooks, occupation, person, pointing, portrait, profession, professional, professor, school, senior, smiling, study, teach, teacher, technology, tutor, university, whiteboard, woman, work,