Ключевые слова: 20s, academic, adult, african, american, assistance, boy, brunette, casual, caucasian, chair, classmate, classroom, cropped, crouching, desk, education, educational, female, focus, girl, hair, high, indoor, knowledge, learning, long, male, multiethnic, occupation, people, school, schoolgirl, schoolwork, selective, sitting, smile, student, study, studying, teacher, teaching, teenager, three, together, university, woman, women, young,