screen cast and screen capture. include a video from your camera in screencast. $15 so possible a cheaper version of the capture feature of screenflow. doesn't include editing, just capture
how to create a screen cast tutorial for educators.
software: screenflow ($100), keynote (free), omnidazzle (free, but doesn't work beyond OS 10.6.8)
hardware: wacom tablet, macbook, external mic
screen flow software records your screen as well as your camera and mic - so you get a video screen of you talking to your viewers inside your presentation.