Ключевые слова: 40s, 8 years old, assisting, casual clothing, caucasian, child, children, class, classroom, concentrating, concentration, desk, education, eight years old, encouraging, female, forties, girl, happy, helping, indoors, inside, junior education, junior school, learning, lesson, listening, people, person, primary education, primary school, pupil, school, schoolboy, schoolchildren, schoolgirl, sitting, smiling, student, study, studying, teacher, teaching, together, vertical, writing, young,