Hmmmmmmmm.
My gut feeling is that a student who get got a 5+ in Y10 and a 6 in Y11 mocks isn’t a natural candidate for Further maths. The Y10 result suggests the Y11 one wasn’t a bad day.
The most likely progression from mocks to the real thing IME is to go up a grade. Some students stay on the same grade. Some (rarely) go up 2 grades, with considerable effort, the ones I know who’ve done it have had tutors. (That’s assuming a totally normal Y11).
Normal progression would put him on a grade 7. Enough for A-level, but probably not heading for the top grades, not enough for Further maths.
I think based on what DS says, it's mainly careless errors and failing to write down his workings. His ability is definitely there as he tends to get the harder questions right
I don’t think this can be true. A grade 6 on Edexcel last year would have been between 45% and 57%. That’s a significant amount of careless errors. Not writing your working isn’t penalised unless you get the wrong answer, unless the question specifically asks for your reasoning. Either he isn’t as good at maths as he previously thought, or he has seriously slacked off on revision and doesn’t know his stuff.
Getting the papers back and looking at them thoroughly will be key. Once he has identified questions that he really should have got but didn’t, he needs to work on those topics.
There have been some good links above - Corbettmaths has got videos on every possible topic as well as the 5 a day questions.
www.piximaths.co.uk/revision-booklets these revision booklets are arranged by topic - they tend towards the more difficult, so I would suggest ‘grade 7’ rather than ‘grade 9’!
He needs to know that maths revision isn’t the same as other subjects. No mind maps, writing notes, highlighting. He needs to do lots of questions.
I wouldn’t start with papers right away, I would do topic-focused revision.
Pick a topic
Watch a video/read revision guide and work through examples with guidance
Do some questions on the same topic
Check the answers
If he got any wrong, try to figure out why.
Fix the questions he got wrong
Go back and do some more questions and get them right
Pick a new topic and start again.
They need to do way more questions than they think. Not until they can get them right, but until they can’t get them wrong.
Once he has mastered his weak topics, then he can start doing more general practice.