Hi - retired TA (male) here :
MATHS : I always think that children will grasp numeracy concepts best if they can work with REAL objects or equipment. Until the basic concepts are secure, it is difficult to move on to the more advanced and abstract things.
I will quote some of a PM I sent to another parent last year, though probably of a much younger child :
QUOTE :
The more practical, physical work involved in maths the better, as some children find it difficult to work with 'abstract concepts'.
And maths is always going to be about 'real' things - quantity, weight, volume, length, distance, height, money, telling the time, angles, speed, etc. So if she does a bit of cooking occasionally, following a recipe, noticing quantities, that will put numbers into the real world. Or even playing with plastic containers in the bath, seeing how many small containers it take to fill a large one. Anything to stop numbers and maths being a 'mystery', which it has always been for many adults.
UNQUOTE
WRITING :
I am reluctant to concentrate TOO much on on-line activities, but some that I DO use (and people seem to like) are : ictgames.com/ which has numeracy and literacy activities, and : resources.woodlands-junior.kent.sch.uk/ This has a very wide range of topics and DD should find a few things to interest her.
Am I to assume she is your only child? Also, some girls can start to mature at an ever younger age, and might exhibit almost 'teenage' non-co-operation behaviour. If there might be an element of that, it is probably wise to not 'push' her too much, yet you still want her to progress as well as possible : a difficult balancing act!
In addition to earlier advice, perhaps writing a diary, particularly of more interesting weekend activities, might encourage her. Maybe she could write stories for younger classes at school, trying to make it interesting or exciting for them. (Some schools encourage co-operation between year groups; others might not touch it with the proverbial 'barge pole'!)
[So children could relax after SATs, I once worked for three weeks with groups of Yr2, building a 2m high Tyrannosaurus Rex from cardboard boxes, and they went round the other classes to tell them about it, and to show 'work in progress.]
Hey! I've just re-read the bit about 'camp'. She can write about that, and you can 'publish' it here!
Good luck.