Sketch Cast with recorded voice

Here is experiment number two with Sketch Cast. I hoped to do a short tutorial and treat the Sketch Cast screen as if it were a chalkboard for writing in main points. I have a headset for recording and it picks up the tapping of the keys quite well.

That knocking noise that sounds like someone wrapping on a coconut? I must have been hitting my coconut-like head against something. No idea.

Think of this as a rough draft, an exploration of possibility, something like that....