a 21st century problem courtesy of Steve H

"One recent morning, seven parents left their homes and jobs and drove to an administrative office here to sit through a two-hour tutorial on addition and subtraction." (comments needed )

This sounds like the start of a word problem!

Then how many hours will it take to tutor parents when they get to fractions? How many hours for algebra? What is the shape of this curve? (Hint: Can you say " exponential"?)="">

Bonus question:

How much steeper will the curve be if the school uses discovery methods during their parent tutorials?

Please use your critical thinking skills.