Paul, did you hire a voice actor? If not, you have a dynamic voice that is perfect for pitching and narrative informational videos. I believe the audio is only going to one channel, though – I hear it on my left side of my laptop speaker and on my left headphone – I thought maybe something was going on with my computer, but I checked with other audio to be sure. You outline everything with great research to back it up, and the phases are well detailed. I think $25 a teacher might be a low number, though. Take my money – if I had it, I would definitely invest in your venture. Thank you for sharing this with us, and best to you!