No problem. That was specific advice I was given when doing a teaching demo, and at which I was successful. I would look for specific information on teaching demos, rather than more generally on effective presentations. There are sources online and books that address the topic in more detail, and I looked at a few, and I believe the advice was similar. I am not sure if that course will necessarily improve your odds, but it couldn't hurt. Ultimately one needs to get some experience teaching before anything else is possible, so maybe that will help facilitate that if you are still in need of a faculty position at that point. I imagine if you keep actively applying and pursuing your doctorate, at some point you will get your break.