Did you know you can make a screen recording of your lecture and write on the screen, even if not using powerpoint?!? First of all, you can use Quicktime to record your screen. Open quicktime and select, "record screen." This will open a small record button, hit record when ready. To write on the screen, I use Omnidazzle. Omnidazzle can be downloaded HERE. Omnidazzle is simply to use. Use the configuration window to make shortcuts for the pen and for clearing the screen (erase.) I use "option 1" for pen and "option c" for clear. Quicktime videos can then be imported into youtube. Very Slick!