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He asked somebody to raise their hand and ask him when we would use calculus in our everyday life. So one student rose their hand and asked, “When are we going to use this in our everyday life?”

“NEVER!!” the teacher exclaimed. “You will never use calculus in your normal, everyday life. In fact, very few of you will use it in your professional careers either.” Then he paused. “So would you like to know why should care?”

Several us nodded.

He picked out one of the varsity football players in the class. “You practice football a lot during the week, right Tim?” asked the teacher.

“Yeah,” replied Tim. “Almost every day.”

“Do you and your teammates ever lift weights during practice?”

“Yeah. Tuesdays and Thursdays we spend a lot of practice in the weight room.”

“But why?” asked the teacher. “Is there ever going to be a play your coach tells you use during a game that requires you to bench press the other team?”

“No, of course not.”

“Then why lift weights?”

“Because it makes us stronger,” said Tim.

“Bingo!!” said the teacher. “It’s the same thing with calculus. You’re not here because you’re going to use calculus in your everyday life. You’re here because calculus is weightlifting for your brain.”

When it’s taught right, learning math teaches you logic and how to organize your brain, how to take a problem one step at a time and make sure every step can bear weight before you move to the next one.  Most adults don’t need to know integrals, but goddamn if I don’t wish everyone making arguments on the internet understood geometric proofs.

Scientific concepts broaden our understanding of how the world is put together, which does not mean that most adults ever really understand how light is refracted through a lens or why spinning copper wire creates electricity–and they don’t need to.  But science classes in general are meant to teach the scientific method: how to make observations and use them to draw conclusions, how to test those conclusions, how to be wrong and grow stronger from it.

History isn’t about dates and names of battles, it’s about people, patterns, things we’ve tried before and ought to learn from.  It’s about how everything is linked, how changing one circumstance can lead to changes in fifty others, cascading infinitely.  Literature is about critical thinking, pattern recognition, learning to listen to what somebody is saying and decide what it means to you, how you feel about it, and what you want to do with it.

Some facts matter: every adult should know how to read a graph, how global warming works, some of the basic themes and symbols that crop up in every piece of fiction.  But ultimately, content is less important later in life than context.