TAFE Randwick is running a 4u maths class on Thursday evenings:
I can't link the course here but it's the "TAFE STATEMENT IN HSC MATHEMATICS EXTENSION 2"
TAFE NSW code: 800-000608-22RDW-001
Guess I'll maintain this topic now
I'll post this now since this is about the time where yr 11s will be getting their yr12 timetables for next term
If you didn't get into extension 2 maths at your own school and your school is adamant about not letting you do it, an option is to do it via tafe.
I still can't link the course, but searching up "tafe extension 2 maths" will probably bring up the site you need
Enrolments don't open till the beginning of the year, so don't worry if the website says "Sorry, this course is not currently open for enrolments" right now.
The 2022 class ran on Thursday afternoons at tafe Randwick 5:30pm-8:00pm (this might change for the 2023 class though)