I recently discovered this blog, and I've been sending copies to everyone I know who is interested in high school math education. I have no words to express how cool I think this is. Especially her math doodle series.
I couldn't figure our quickly how to embed video from her webpage, so here's the youtube link to a good example.
Also, check out her playing in a quintet of flaming paper instruments. It's less mathematically sophisticated, but it involves fire, so a lot is forgiven.
I have no words. Go watch!