Ключевые слова: answer, answers, blackboard, board, boy, caucasian, chalkboard, child, childhood, class, classmates, classroom, college, education, elementary, female, girl, grade, green, group, hand, hands, kid, kids, learn, learning, lesson, lifestyle, listening, little, math, near, people, pupils, questions, school, schoolchild, schoolgirl, study, studying, teacher, teachers, teenager, white, woman, writing, young,