I went to LBTS with my teenage daughter to dive earlier this week. She came for AOW course with LandonL as her instructor and I dove as buddy. She read the NAUI AOW and nitrox instruction books ahead of time as preparation on her own, with only some math guidance from me for some nitrox calculations. LandonL had an academic review and test for her for both sections. I can say that the NAUI nitrox course given by LandonL was a lot more thorough than my PADI one, which I got through my local dive shop, although in these days of computers, not necessarily more practical, at least for recreational vacation diving. I think I can safely say that I enjoyed the discussion more than my daughter. LandonL really knows the material, why it is, what is historical, what is debated, what is scientifically verified, and what is important for us.