Ключевые слова: academy, asking, chalk, child, class, classmate, classroom, cognition, desk, discussion, education, elementary, elementary school, engaged, exam, female, floor, frame, friendship, group, guy, illustration, inside, isolated, joy, knowledge, laughing, learning, letter, listening, math, offspring, paper, pencil, prevention, smiling, student, talking, teach, teacher, teamwork, textbook, three people, transparent, tutor, vertical, volunteer, woman,