how hard is it to get all 9s at gcse?

Imagine trying to kill yourself with a single elastic band... that's the difficulty. But hey if I got all 9s apart from 1 (French) in my mocks i don't see why you couldn't do it.

im predicted six 9s and four 8s but i dont know what to do to put myself in the highest band out there for those four other subjects (english language, english literature, physics,business). Id appreciate useful advice x

Hey! I can really only help for business because that's one of the subjects I'm predicted a 9 in and have achieved a 9 over the last two mocks!
To get a 9 in business you have to readily apply context to 9 and 12 markers as if you're predicted a 8 you are most likely already getting full marks on 3 markers and 6 markers. To get the top marks you must apply business context to the question, such as if the case study is 'NANDOS' If the question is related to JUST IN TIME , you will have to talk about how they can run out of chicken , even if it's not mentioned in the case study.
Hope this helps

Physics bang out papers & revise content. English lang: practise structure for eaach and look over different language techniques. English Lit: Do essays on the main characters etc.

thanks i will do my best x