Ключевые слова: beautiful, boys, childhood, children, class, classmates, classroom, closeup, concept, desk, education, elementary, exam, examination, exercise, girl, girls, grade, group, happy, indoors, junior, kids, knowledge, learning, lesson, life, little, pen, people, person, preteen, primary, pupil, school, schoolboys, schoolchildren, schoolgirls, schoolkids, smiling, solving, students, studying, task, test, time, writing, young,