I'm working with a Python development team who is experienced with programming in Python, but is just now trying to pick up TDD.  Since I have some experience working with TDD myself, I've been asked to give a presentation on it.  Mainly, I'm just wanting to see articles on this so that I can see how other people are teaching TDD and get some ideas for material to put in my presentation.
Preferably, I'd like the intro to be for Python, but any language will do as long as the examples are easy to read and the concepts transfer to Python easily.
I started unit testing a handful of years ago, and I've read quite a few on it since my initial book.
However, my initial was "Test Driven" by Lasse.
For me, the author made it simple to understand.
Perhaps you could pull some info from it for your teaching.
And btw, I've taught TDD as well.
I have found that ensuring the audience understands how to use unit tests before going into TDD to be quite handy.
Good luck!  :-)
Are there any good online tutorials to TDD for an experienced programmer who is new to testing?