Setting in Year 7? When I was teaching maths we abandoned setting in Years 7 & 8, only introducing it in Year 9.
It might help you if you can see what you daughter is working towards. Old SATs tests can be downloaded from here:
http://emaths.co.uk/index.php/4-students/past-papers/ks3-sat-papers
Also look though the KS3 Maths books listed on Amazon:
http://www.amazon.co.uk/s/ref=nb_sb_noss?url=node%3D291678&field-keywords=KS3+Maths&rh=n%3A291678%2Ck%3AKS3+Maths
(Many of them have reviews, so you wouldn't be 'buying blind').
Better still though, simply take a look at what your local branch of Waterstone's (or even W H Smith) has to offer. Then you'll be able to see what's inside the books. ('Remaindered' bookshops, such as 'The Works' often seem to have relevant books too).
Remind your daughter of the golden rule for Maths lessons: "If you haven't asked a question - or possibly lots of questions - you're either better at maths than your teacher or simply not learning as well as you could do". Loads of academic studies - and my own experience - suggest that girls often fail at maths simply because they don't ask enough questions.
Lastly, remember that there are online resources as well, such as this from the BBC:
http://www.bbc.co.uk/bitesize/ks3/maths/
Chris