Ключевые слова: adult, answer, arm, ask, back, blackboard, boy, caucasian, chalkboard, child, class, classmate, classroom, college, concept, crowd, education, female, fun, girl, group, hand, happy, high, indoor, knowledge, learn, learning, lesson, male, people, pupil, question, raised, school, solution, student, study, studying, teacher, teaching, team, together, training, up, vote, voting, white, woman, young,