Ключевые слова: african american, black girl, caucasian boys, caucasian girl, cheerful, children, class, classmates, classroom, desks, education, elementary age, elementary school, exercise books, girls, happy, kids, knowledge, learn, lesson, multiethnic, people, preadolescent, preteen, pupils, school, schoolboys, schoolchildren, schoolgirls, schoolkids, schoolwork, sit, smile, students, study, studying,