Thomas Goes to School is a mini book.
Everyday, Thomas puffs down his branch line and passes a village school. Thomas goes around the curve and whistles to the children on the playground. They stop playing when they hear Thomas and run to the wall that separates the track from the school to wave to him. Thomas would like to go to school, but Sir Topham Hatt said "You're far too big to go to school and far too useful!" One afternoon, Thomas stopped by the school, but the children did not wave or smile.
A group of parents and teachers were standing by the school looking serious. A banner read "Save our school from closing down! Come to our Grand Fair!" On the way home, Thomas' driver gets the idea to bring his two donkeys to the fair and give the children rides. Thomas' fireman says he has a clown costume to wear and make the children laugh. In the shed that night, Thomas tells Percy and Toby about the school fair. Thomas wants to help because he would miss seeing the children.
On the morning of the fair, Thomas' driver tells Sir Topham Hatt some bad news. His donkeys had come down with a bad cough and could not come to the fair. Thomas is polished and he is to give the kids rides instead. Annie and Clarabel are decorated with balloons for the fair. Thomas puffs to the fair. Thomas is the main attraction and Sir Topham Hatt announces that they raised enough money to save the school and everyone cheers. Thomas is delighted that he helped save the school.
- As far as it is known, this is the only mini book not to have an accompanying CD or cassette.