I assume you're talking about AQA Religious studies, rather than AQA Philosophy?
For religious studies, it is not on the advance info so it can't come up for the 10 or 15 mark questions for ethics.
Nor is it needed for the 25 mark dialogues questions.
However, your teacher might be thinking that it's worth learning because it is possible to use it for the 25 mark dialogue questions, even though it is not necessary.
I would say that unless you are aiming for an A*, I would not bother learning it.