Ключевые слова: adult, answer, background, boy, caucasian, checked, child, children, class, classroom, closeup, cute, education, educational, elementary, exam, examination, exercise, female, form, girl, grade, indoors, kid, knowledge, learn, learning, lesson, mark, paper, pass, people, person, preteen, pupil, results, school, schoolgirl, sheet, sheets, student, study, studying, task, teacher, teenage, test, time, woman,