Textbooks:
Maths - School uses Fitzpatrick for 2/3/4U. They also assign exercises out of Cambridge and Coroneos on sheets that they photocopied. I have all 3 at home.
Chem - Conquering Chemistry. I also have Chem Contexts at home but it's more a supplementary textbook to Conquering.
Eco - The Market Economy 2007.
I don't do Phys, so I don't know about that. Business Studies isn't offered at James Ruse, so no idea there either.
Also the English teachers ARE REALLY GOOD at James Ruse, they help a lot in working out concepts, developing essay writing skills, etc. I have a paragraph due every Friday on a different text related to the module, so it really helps in learning how to right on many texts on the same thing. TO study for English, I basically write a draft essay, hand it in to my teacher, get her to mark it, do it again, get her to mark it till I'm getting 19-20/20 from her. then I rote learn it and memorise it. And I just adapt to the question asked in the exam. Basically I leave the intro and conclusion open ended until the exam, and just add in various references to the question within my body paragraphs during the exam.