In doing the 2022 Part 1 course (my first exposure to fast.ai), but its hard to judge how much time I spent on it - there were lots of different things to dig into, and also following interesting rabbit holes. And it also depends on each student’s past experience. Are you considering 4 consecutive days, or some other arrangement?
I don’t think you need to fully consolidate lessons before moving to the next one. Learning this is an iterative process with pieces bouncing off each other as you go along.
I think you could aim for two course lessons a day, plus one Live Coding video for homework.
Prior to each lesson, as a group read through a print out the associated questionarie and answer them as you first watch the lesson video all the way through. Then rewatch it in a start/stop way to replicate it - here is the notebook for the first one: Is it a bird? Creating a model from your own data | Kaggle .
Look for others in these lesson resources or here.