Ключевые слова: adult, attractive, audit, biology, blackboard, blond, board, caucasian, chalk, chalkboard, chemistry, class, classroom, development, doctor, education, expertise, female, formulas, instructor, lab, laboratory, lecture, looking, mathematics, medical, medicine, numbers, people, person, portrait, professional, professor, research, researcher, school, science, scientist, seminar, student, study, teacher, teaching, university, white, woman, women, worker, write, young,