Hi! I assume you're using the Cambridge textbook, so my advice is as per follows:
Key things in Chapter 4:
1. Know the shape of your 4 basic rules from 4A to 4D
2. Know the key features of your 4 graphs
3. Be able to describe a sequence of transformation that has taken the basic graph to the transformed graph
4. Be able to graph a given rule
5. Be able to find a rule given certain key features/coordinates
Key things in Chapter 5:
1. Know how to express an answer/domain/range in either set notation or interval notation
2. If a relation passes a vertical line test, it's a function
3. If a relation passes a vertical and a horizontal line test, it's a one-to-one function
4. What is implied domain and how to find the implied domain for the different rules
5. How to use function notation to show your working out
6. Hybrid functions
7. Inverse functions
8. Modelling (which of course is the last thing on the list for you if this is the one you are struggling with the most)
Other general advice:
I'm sorry to hear that your teacher is not great for you. 11 Methods is a very packed curriculum and sometimes the inexperienced teacher might find it hard to pace it well. My advice would be for you to try your best to understand as many concepts as you can before your SAC. If you're not 100% ready for it, it is fine. What you should be focusing on is being able to do it ultimately. So that could mean trying to catch up on the things you've missed over the upcoming holiday (posting questions here when you're stuck, asking your friends, finding videos online) and then working through the SAC again independently.
Fortunately, this is only Year 11 and at the end of the day, your SAC won't mean much, so hopefully you can take comfort in that. But my other advice would be to try and develop some independence in your Methods work, in the unfortunate event that you get a teacher next year that is not well-suited to you again. At the end of the day, you want to be able to take ownership of your own learning! I know of people who have gotten great study scores with "lousy teachers". You'll just need to find the right avenues.
All the best!
