I maintain that as an unschooling parent, I don’t teach, I facilitate. I try really hard to live by those words. One of the reason is the fringe benefits I reap by not ‘teaching’. Let me stop here for a moment to summarize ahead of time. The point I’d like to make is that you don’t have to know the things to help someone else learn the things. Even better, frequently I find myself learning very cool new things I didn’t know before. Unschooling works, and it benefits everyone! Everything else below is rambling about math. Here we go! The kids and I have been talking about number bases for a few years now. Starting off in base two arithmetic—binary. It was an easy way to look at concepts without worrying about memorization. The addition and multiplication tables for that base have only four entries a piece. There’s not too much you have to memorize when the only numbers you have to work with are one and zero. A few years into this odyssey, the kids and I started looking into r...