The first day of classes are on Monday and I’m trying to make a point for my high school math students. You can guess where I’m trying to go with it.

But I need a couple more examples of the following:

What are things that could possibly help us one day but very few people know how to use them?

So far, here’s what I’ve come up with:

- Fire extinguisher
- Car jack

Can you think of anything else?

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