The short story had a little girl named Margie who lived in the future where there were no schools and there were only artificial teaching computer systems. The girl's "teacher" was due to some reason not working and giving her hard homework. They later had to call a mechanic. The girl had a friend who had found a real book and was showing it to Margie.
I read this story somewhere in the last two years so it must be fairly new. The short story was no longer than 2-3 pages.