Shouldn't you be practicing :)
Seriously though, if you're going to teach this, make sure you have the time to see it through.
My advice on how you, or anyone else, might teach this: -Everyone is going to be coming in with different levels of understanding. Some won't know how to read music, while others know chords and scales. You'll have to decide if you want to teach note-reading as well, which is tough. You might want to make the ability to read sheet music a pre-requisite.
-Probably the best way to actually run the class would http://www.anymeeting.com/ or a similar free web conference program. You can share your screen with everyone, and play things through your mic. It'd be a bonus if everyone had mics as well, then you could assess singing.
-You have to be creative in how you assess. For instance, if you wanted to see if everyone understood chord inversions, you could ask everyone to spell out a ii6 in B major and pm you their responses. You could do the same process for ear training - have them pm you what inversion chord they hear. Walk through the steps with them first - demonstrate singing the whole chord 1-3-5 style, then pick out the lowest note and sing it, then ask which note it was of the chord.
> http://www.anymeeting.com/ Thanks so much for this link!
>you could ask everyone to spell out a ii6 in B major and pm you their responses. That's sort of like a homework substitute, I like that! Although I'm not going to be detailing any chord inversions so soon!
I'm actually hosting a free webinar about how to deal with criticism (the post that I've recently just released), envy, and haterism. I'd love to meet and talk to all of you in person, and I thank you for reading what I write. It's totally free, and being hosted on Monday, March 11th at 7:00pm London time.
Register here: http://www.anymeeting.com/PIID=EA53DA8685463E
Hope to see you there!