Q: What’s the difference between a teacher and a train??
A: A teacher says, “Spit out that gum!” and a train says, “Chew! Chew!”

Explanation: Or perhaps the train says, “Choo, choo?!?”

In most schools gum is not allowed.  If a teacher sees you chewing gum he or she will ask you to spit it out (even though there are some researched benefits of chewing gum).

Another name for a train is a choo choo and that sounds the same as chew- chew, probably because of the sound of the train whistle.

This joke is funny because it plays with the words “choo choo” and “chew, chew.”

If you like trains you might watch the Choo Choo Bob Show, Thomas and Friends,  go to a train show or travel Europe on the Eurail.

Or you could watch a 1903 silent film- The Great Train Robbery!