Hmmm I’m going to go against the grain here. It’s all very well to say ‘read a lot’ and that’s great advice from an English teacher, but as a maths teacher, that’s not going to help with her maths.
A lot of secondary schools test Y7s in maths within the first few weeks and use these results (along with SATs) to set pupils. If she is rusty due to weeks of no use then she will not hit the ground running.
A pupil who is below the expected standard at KS2 is statistically more likely to be below expected standard at GCSE (grade 4). Lots of parents panic around Y10/11 time and hire tutors to try to get their children over the line. Telling those same parents to chill out in Y7 seems a bit counterproductive. I always say to parents that any maths that can be done at home will be of benefit in the long run.
You don’t have to go mad and hothouse her, but I’d practise these basic areas:
- Instant recall of times tables including divisions (MOST IMPORTANT THING EVER)
- Consistently accurate use of written methods for addition, subtraction (inc borrowing), multiplication and division (bus stop)
- Mental methods for e.g. 20 x 300, 6000/20, 23 x 7 (20 x 7 + 3 x 7)
- Able to multiply and divide reliably by 10, 100, 1000 including decimals
- Being able to spot common factors of numbers (e.g. what goes into both 24 and 32, or 25 and 30)
She will probably be ok at this stuff as the SATs are numeracy heavy. If she can do all this at the start of the summer, don’t assume she’ll be able to do it at the end, kids forget stuff.
There are computer packages you can sign up for, like mathletics or workbooks you can buy if you want something more structured.