KS said: If her refusal to say the pledge of allegiance is the result of ideas you have put into her head, then she isn't standing by her own convictions, she is merely echoing yours, even if she chooses on her own to do so.
The requirement for her to say it isn't her own idea either. If kids want to say it - because the school system taught the educational value behind it - vs. saying " hey you're american, (Russian, greek, nazi, or whatever country someone is in where there's a required chanting ritual) so you have to say this!"
But it's school policy - and not really presented as optional. So, parents have to interject if they want kids to think it through - the gov't and the school system sure don't explain it as optional.