How do the children learn about old schools in the story?

Correct answer: By reading an old book

The children learn about old schools from an old printed book that Tommy finds and brings to Margie. The book describes a time when children attended a real school building, studied together, and were taught by human teachers. Margie is surprised because the words remain fixed on paper, unlike the moving electronic text of a telebook, and because she has never experienced such a school. Therefore, option A is correct. Television news, playing a game, and visiting a market are not sources of this information in the story. The old book is important because it introduces both children to an earlier form of education and makes Margie compare it with her isolated machine-based lessons.