Flexible hours, and no travel-time :). A free open-source whiteboard is used to help illustrate and collaborate on concepts. Topic material can be scanned/emailed to me for preparation.
Top of the class in high-school. Highly-ranked nationally. I took a few years of engineering at the University of Toronto (which involved pretty much pure math and physics).
$12/h, which can be payed online (via your bank's website, etc). I also accept Bitcoins.