I think teachers probably get a bit jaded by every parent thinking their child is amazingly brilliant (which...of course parents think their kids are great!) . But when a child is truly gifted, teachers may think it's the same old 'my child is special' mantra they hear every year.
Yeah. sigh. I think many of us have been there.
DD(then 6) Grade 2:
"I don't think she's as smart as you think she is."
Then, a few months later...
"We pulled her out to do some testing and it looks like you were right after all - she is advanced."
Ah... vindication.
In preschool (4) she was showing a little bit of advancement initially (i.e. writing words instead of drawing pictures like the other kids) but started playing chameleon the minute she discovered she was the only one. Since then it's been a struggle to convince the teachers.
When she was a toddler at home with no peers, it was a totally different story of course - happily reading (Dr Suess) at three, math including multiplication, etc etc, but get her in with typical peers... and she shuts down. Now at 9 she's in the gifted pull-out math program, which is nice.
Anyway, to the OP, teachers will think what they think, and you can either roll with the punches and wait, or start compiling evidence (i.e. portfolio material) to show them.
Hang in there, and keep on advocating.
