Ключевые слова: academic, academy, adult, background, bearded, blackboard, blank, board, caucasian, class, classroom, college, communication, confident, course, education, educational, explaining, happy, indoors, intelligence, knowledge, learn, lecture, lesson, male, man, mature, occupation, paper, pencil, person, portrait, professional, room, school, smart, smiling, space, study, teach, teacher, training, tutor, university, wall, white, whiteboard, worker, writing,