hey i go to zhangs! i recommend doing a trial first - they do 2 weeks! (this is what i did and compared both ace and zhangs)
zhangs gives you resources that cover two weeks and you get copies of the powerpoints, homework and class quizzes. when you actually enrol and pay for the term, they give you this huge textbook style material that covers the mod (that i absolutely love) it also has practice qs and stuff. The format is very old school and lacks paragraphs but other than that its very helpful - forces me to write my own notes
you should also note that year 11 2023 started last year term 4 so we have already finish mod 1, you might be able to catch up but im pretty sure they charge you for materials prior to your enrolment.
btw are you planning online or in person?
i did online last term due to being too lazy to travel lol but yea this term im switching to f2f. i found their classes really flexible when wanting to change class times and booking make ups. a lifesaver when online was the extension class which is basically an hour session where a tutor goes through homeowrk/schoolwork with a small group of students (honestly no more than 6?? just whoever books) . all rotating tutors were friendly and gave good explanations.
feel free to pm if you have any questions!