Ключевые слова: blur, body, calculation, child, childhood, children, class, closeup, dim light, document, education, example, female, girl, hand, home school, homework, human, independent, learning, lesson, lifestyle, little, mathematics, measurement, method, notebook, notes, numbers, one, paper, pencil, people, person, reading, ruler, school, solution, stationery, student, study, table, task, teacher, teaching, white, writing, young,