Sounds like the teacher has a bad case of overconfidence. It's hard not to feel stonewalled when dealing with people like that. cry The only way I see as getting around this is to agree to disagree and then see if they are willing to use objective data to make a decision about whether to give him accelerated material. Would teacher be willing to look at curriculum-based above grade level testing? BTW, I suspect your DS would ace that 3rd grade state test she's talking about... wink

As far as bringing in other material like Singapore math... It's a great idea in theory. But only if you're pretty confident that she wouldn't get p.o.'d at the suggestion she might not be all-knowing...