we've had this. (hope we aren;t going to get flaming types - I'm just being honest...deep breath) dd is a bright little thing. my mum, a teacher, was stunned by what she could do maths-wise at a very young age. but she's a quiet thing, doesn;t put her hand up much, not one to do show and tell, always complained (to me not school - she wouldn;t dare) about being bored - couldn;t see the point of doing 10 easy sums after she'd done the first 2 or 3. I kept saying to her that unless she showed the teacher she could do them the teacher had no way of knowing and wouldn;t give her harder stuff. for a couple of years it didn;t really work, and we muddled along. we had one teacher who hardly ever said anything about her abilities - just kept saying that she needed to praticipate more in class, to the point where it really riled me that she only picked up on this one negative and said hardly anything positive, which made me cross - because I think she had a slightly one-size-fits-all approach. in year 3 she had a teacher who got the size of her a bit better and saw the positives in being quiet, and just seemed to be a great teacher who dd adored. now in year 4 she's doing well - lovely comments in her work books, lots of what our school calls "fast track" work.
the conclusion I;ve come to is, that assuming you don;t want to pack your child off to university aged 14, you just want them to enjoy school, enjoy learning, and acheive well then I think you have to take a long-term view. I don;t think it matters if their year 2 teacher doesn't get the size of them and thinks they're average when they're not, they;ll have goodness knows how many teachers over the years, goodness knows how mnay subjects to study (one will grab them); parental support at home - museum trips, books, walks in the countryside spotting wildflowers, whatever it is you do. they'll be fine. they'll find their levels, it will all work its way out in teh wash. unless you have serious behaviour issues and need to nip something in the bud I honestly think you can support them at home, talk to teh teachers, and let them find their own feet. they're still an awfully long way away from adulthood...there's plenty of time. all, of course, imvho, and based largely on dd