Here is what I did.
I bought the CGP books for the 4 subjects (English, maths, VR and NVR)
We went through each book and made sure she could do everything.
So, for example, on the page referring to shape, I realised that she need to know lots of vocab (shape names eg pentagon and rhombus, acute angles, isosceles triangle) plus lots of shape facts (eg the angles inside a triangle add up to 180) She had done all of these at school, but didn't necessarily have the facts at her finger tips.
Then we used the books to practice them in real questions.
At the same time we did lots of vocab learning. I have old style VR books and I used lots of the questions from there, eg the synonym and antonym questions, we learnt the vocab she didn't know and it was good VR practice.
We also drilled times tables till she knew them including as division facts.
Then we did the practise tests in the book under test conditions, we used out local library, as she found home wasn't test like enough! This helped her to learn the test skills, like always putting an answer, if you get stuck, move on, keeping an eye on the clock, so you don't run out of time for the ones at the end that you can do.
We found all the practice tests very very hard to do in the time. But we also worked at improving speed.
It worked, she is in the PAN for SHS.