What does the description of old school do for the present reader?

Correct answer: It makes a familiar school seem new through a future child's eyes

The governing concept is the effect of perspective in storytelling. Most readers recognise a school building, a human teacher, classmates, and printed books as ordinary parts of education. Margie, however, lives in a future where she studies alone at home, so Tommy's description makes those familiar things sound strange and remarkable. By presenting the old school through her inexperienced eyes, the writer helps readers notice the social value of ordinary schooling afresh. The passage is not an instruction manual for machines, Geography, or printing; its main function is to renew a familiar experience through an unusual viewpoint.