Ключевые слова: answer, attention, boy, boys, childhood, children, class, classmate, classroom, communication, concentrating, diversity, education, elementary, elementary school, explaining, girls, group, junior high, junior school, kids, knowledge, learning, lesson, listening, man, middle school, mixed race, multicultural, people, preteen, primary, pupils, raised hand, room, school, schoolchildren, schoolgirl, science, sitting, smart, students, study, studying, talk, teacher, teaching, whiteboard, young,