[steveklabnik]

Disclaimer: Jeff is my boss.

Jeff in particular taught high school in inner-city DC with Teach for America. He then went on to help start-up a school and served as principle-ish, if I remember my history right. So he has quite a bit of Actual Teaching Experience.

As someone who's taught alongside him, Jeff's really good at making sure that everyone is paying attention, that he's not going too fast or too slow, and balancing questions with moving the lecture forward.

Oh, and Jumpstart believes in its teaching so much that we put our curriculum online: http://tutorials.jumpstartlab.com/ We sell teaching, not secret-sauce lessons.