The other thread about whether or not teachers are good teachers if they don't know all other content areas gave me the idea for this thread. We may not be experts in every subject outside the one we teach, but I'm willing to bet that there are other areas that each of us has explored, possibly when we were younger and were interested in. For me, I could answer a ton of questions about world history. I was fascinated by it throughout my life, and even studied it quite a bit in college, going overseas for archaeological digs and such. I can also do quite a bit of higher level math, but I wasn't as interested in it as Archaeology.