If you haven't looked yet, the Flite Test STEM/Education programming is very impressive. A very professional and fully integrated approach. And the content behind them is very well done.
https://www.ftstem.com/
AMA is going to be hard pressed to match this. Flite Test builds programming targeted at the market. AMA builds programming based on what the EC wants to see. AMA STEM offer? A bunch of old dudes from the local club with a box of overpriced rubber band planes. I suppose that's why a Flite Test YouTube video has more views in 2 hours than the last five AMA YouTube releases combined!