I don’t know if this will be useful to anyone, but I was trying out the Feymann technique of learning by teaching, and I made a slideshow with a high level description of Lesson 9 of fastai from a different point of view. It was meant to go with some explanation by me, so if it doesn’t make much sense that’s why. The Lesson 9 official topic seems very crowded and I don’t know if this is off topic so I will leave it here for now! I hope it helps!
I can’t upload PDFs since I’m a new user, but here’s a link to it hosted on tiiny.host:
https://crimson-lurleen-57.tiiny.site/