Story about kids and book that tells about good old times in schools

I'm trying to find an short story I read in a collection about ten years ago. Publication date before 1980. Here's everything I remember:

1. The story is about kids that found old book with story about schools in 20 century.


2. In this future kids studying at home with robot-teacher. They don't know how to study with other kids.


3. This kids (maybe sister and brother) run away from their teacher for reading this book in loft or cellar.

Thank you for any suppose.