I have taught people in as many different ways as you can imagine: In the classroom, on the stage, webinars, books, articles, online, offline and upside down. (Ok, maybe not). I've never asked myself why I teach, I enjoy the process and I enjoy seeing what people do with the things they learn.
In person there are essentially two types of education: hands-on or "lectures". I always prefer hands-on teaching for what I feel are obvious reasons: a student is most engaged when they are doing. I have also done many presentations, and the word "lecture" carries a lot of historical baggage but I guess I have done my fair share of those as well.
I have developed countless pages and hours of curricullum on subjects as basic as how to create a composite image in Photoshop to as unlikely as a web standards course for Microsoft Arabia. My favorite curricullum, though is when I am able to walk the line of the real world as closely as possible.
In May of 2005 I began working full-time as the program director of what was originally called the Graphic and Interactive Design certificate program at the Center for Digital Imaging Arts at Boston University.
Dan Cederholm of Simplebits fame had some nice things to say about the CDIA web program.