Ключевые слова: adult, black, book, boy, brain, caucasian, child, childhood, class, classroom, college, concept, cute, education, elementary, elementary student, female, girl, hand, happy, kid, knowledge, learn, learning, lesson, lifestyle, little, male, medium group of people, mid adult, mixedrace, model, multiracial, people, person, portrait, raising, raising hand, school, science, showing, student, study, studying, teacher, teaching, unaltered, university, woman, young,