Ключевые слова: adult, background, blackboard, board, caucasian, chalkboard, cheerful, class, classroom, closeup, college, copy, education, empty, female, girl, glasses, green, happy, holding, indoors, intelligent, learn, lesson, looking, one, people, person, pointer, pointing, portrait, posing, profession, professional, professor, school, schooling, schoolwork, smile, space, stick, study, studying, subject, teach, teacher, teaching, university, woman, young,