Hello hen27,
I'm sorry I am not familiar with the Baldwin matrix, but maybe someone else will be able to help. From what you've said, it sounds like the school is not especially inclusive with its current criteria for gifted. I'm sorry that your DD is being excluded based on these screener tests. It does seem to be good news that your DD will be able to take the MAP and test in, though. But how very frustrating that the school won't listen to the teacher nominations.
I'm sure you already googled Carolyn Callahan, but I found this article that makes her sound very promising:
An Interview with Carolyn Callahan
