@I AM BUS. Hi, I was in that group as well.
I've been doing some reading on the MTO Bus and Airbrakes Handbooks. And they're very informative.
As for the MTO Bus Handbook, it provides a list of what to do during daily pre-trip inspection of the exterior, in-cab and interior of the bus. It gives a refresher of road signs and traffic rules which I would assume will come out also in the written test. Then the last chapter of the handbook details the road test preparation which even includes airbrakes procedure.
As for the airbrakes, it's mixed with the procedure for truck and bus. But I was advised to just focus on the bus part.
There are maybe some additional steps that we will have to do in the training.
Suggestion: I hope we can get together for group (Sept 27 group) huddles to share our knowledge in preparation for the training. I'm definitely opt for it.