"When am I ever going to need this?" If I had a nickel for every time a student asked me that question, well, I'd have a lot of nickels.
Today a student respectfully asked me this question and I had a truthful answer for him. It went something like this:
Well Little Johnny, I need you to learn how to learn. The most important thing you can graduate from high school with is the ability to learn. So, honestly the material that I teach you isn't as important your ability to understand it. The career you are going to have 10 years from now might not even exist yet and you will need to be able to adapt and grow in that career.