In the lesson 3 Jeremy said it’s important to get comfortable with tensor manipulation. I’ve created a notebook here with a few exercises. Just clone the repo and run the notebook. You’ll need fastai2 installed, but no GPU necessary.
It’s mostly useful for beginners but the more advanced folks can also check it out and show off your short/efficient solutions.
Also if you have more exercises ideas or find bugs/things to improve feel free to send a pull request my way.