Grading in education Puns

When I was in high school, I babysat 2 boys (who at the time of this story, were aged 7 and 10) for some extra cash. One day I was eating dinner with the family when the younger brother said that he couldn't wait to be in the fourth grade like his older brother.

"It's not that great," said the older one. "Once you're in the fourth grade, you have to read a bunch of books for a summer reading log and write a report on one." (In my county, there are mandatory summer assignments, the most common ones are English assignments.)

Their dad said, "Summer projects are good! They help stimulate your brain over the summer! If you don't brush up on your education for those three months, you could lose all of your smartness and never get it back!"

Older brother: "Yeah right. And how did you find that out?"

Me: "Well, they do say that firsthand experience is the best way to learn."