Ключевые слова: abstract, alphabet, arithmetic, background, board, capable, child, childhood, civilization, class, decimal, design, development, education, exercise, focus, fun, game, idea, imagination, intelligent, learning, lesson, letter, lettering, man, mathematics, number, nutrition, pedant, pen, people, school, school class, schoolboy fantasies, student, teacher, the concept of children, training, unusual, variety,