Definitely could cover the Bus Man Course over the summer holidays, then learn the finer details in class etc throughout the year.
In terms of PE ben_ess12, I would probably cover AOS1 in the holidays (NPAG, ecological model or whatever it is etc etc) but leave the next AOS (energy systems) until you do it in class, as it is the most important area of the course. All or most of of Unit 4 relates specifically to energy systems, hence ideally 75% of the exam will be on such concepts and related ones. So I would wait for your teacher to take you through it.
Thanks for the p.e advice. i didnt really look into AOS 2 too much, doing AOS 1 atm (the holiday homework is based on it) and it seems pretty basic-ish so far...
but i will wait for the teacher to go over energy systems, a few ppl have mentioned energy systems are important so i guess it will be better to take on all of this advice

thanks for that. Did you do all the chapter questions relating to AOS 1 now and write notes now?
as for business, i have noticed how small it is, my 1/2 book was bigger :/ but i have briefly gone through fist AOS and have a decent understanding i will probably go through the rest and have a brief knowledge of the course