DC (year 11) is fully capable of a suite of top GCSE grades but in one of her subjects she's had 3 different teachers in the last year, and two half-terms of cover. She insists she doesn't need a tutor to fill the gaps and will be "fine" but I'm not so sure. I've bought her a revision guide and will buy more if needed, but she's pretty laid back and I'm worried she'll suddenly realise there are holes in her knowledge when it's too late to do anything. Anyone been in a similar situation and got through it with the right result?