Wow. Shame on that teacher.
First, I'd take the opportunity to use it as an opening to discuss respecting others beliefs and the variety of them out there. I would let your DD know that it is a theory, and with theory there comes belief. I would let your DD know that while the teacher may not believe in this theory, much of what she teaches is fact and not a lie.
Then, I would send a note to the teacher and/or principal letting them know that you think religion, regardless of what it is, should be respected. I, personally, don't have a problem with any and every religion in the classroom provided it is in an objective manner and not a push for one or the other. I would let the teacher know that you expect a theory to be taught as a viable theory regardless, including the possibility it could be wrong.
That said, I believe in God and in evolution. We do not know how God created the world and/or man. We do not know if God views days/time in the same way we do. Additionally, as a pp pointed out, evolution has been twisted in common thought into something it is not, which is why it really should be taught. Just my opinion.