Ключевые слова: age, among, back, book, boys, building, caucasian, cheerful, childhood, children, class, classmate, classroom, desk, early, education, elementary, exercise, explaining, females, friendly, friends, girls, happy, helpful, helping, indoors, inside, kids, knowledge, learning, lesson, males, people, pointing, primary, pupil, school, schoolboy, schoolchild, schoolgirl, september, sitting, small, student, studying, teacher, walking, writing,