I taught my first investing class 70 years ago. Since then, I have enjoyed working almost every year with students of all ages, finally “retiring” from that pursuit in 2018. Along the way, my toughest audience was my grandson’s fifth-grade class. The 11-year-olds were squirming in their seats and giving me blank stares until I mentioned Coca-Cola and its famous secret formula. Instantly, every hand went up, and I learned that “secrets” are catnip to kids.
