Ключевые слова: 67 years, 89 years, arms raised, asian and indian ethnicities, blackboard, book, boys, cheerful, child, childhood, chinese ethnicity, classroom, color image, day, desk, development, education, elementary age, elementary student, expressing positivity, facial expression, friendship, fun, girls, hand raised, indoors, joy, learning, oriental ethnicity, partnership, people, photography, school, school children, science, setting, side by side, sitting, smiling, student, studying, teaching, togetherness, two people, vertical,