Famous author John Green explains how math and literature are not actually so different from each other, because they both have the same end goal of helping us to understand our place in the universe. "Math people, let me tell you that imaginary stories can be every bit as intellectually engaging as imaginary numbers, and literature people, I am here to tell you that set theory is every bit as fascinating and moving and beautiful as The Great Gatsby."
A very fun math education blog that includes great resources and many posts about honest elementary school reactions to mathematics and their theories. One thing a teacher has to be is prepared for questions we can't answer!