Ключевые слова: age, back, board, boys, building, caucasian, cheerful, childhood, children, class, classmate, classroom, desk, early, education, elementary, explaining, females, friends, girls, happy, indoors, inside, kids, knowledge, learning, lesson, listening, males, people, primary, pupil, rear, school, schoolboy, schoolchild, schoolgirl, september, sitting, small, student, studying, teacher, view, whiteboard,