Every Christian school I know teaches evolution and science. Religion and science are not incompatible. I don't understand where all these creationists are hiding tbh. As a RC, I have never encountered them in rl. They only seem to creep out of the woodwork on Mumsnet!
And as usual only on Mumsnet (and not rl) is it fine to mock other people's belief systems.
But, to answer the op, I don't think it is necessary to upset your dd. (Perhaps she is upset because the teaching she is receiving is not very sophisticated or nuanced or that she is a bit ahead of the rest of the class as she sounds v bright and the teaching doesn't take account of that .)
Suggest you can affirm the fact the world is an amazing place, as are the planets, space, the universe and science is incredible as etc etc, and that some people believe that God created the earth and others (like her Dad) don't. And that she is free to believe what she wants, that we should all respect different beliefs (previous posters please note
) and that her beliefs may or may not change as she grows up.
If she asks more questions you could explain that stories are used in the Bible to illustrate certain aspects of life and creation and that they are not necessarily literal. But that doesn't stop the world being an amazing place and something that we should look after.
Be honest and tell her that theological questions are some of the most amazing and important questions we can ask. Why are we here on earth? Who or what created us? What is our purpose? Where do we go when we die? Is the universe infinite?
I personally think it is fine to tell her that no-one knows for sure, but some people have a religious faith that explains these questions and some people don't.
You could say that some people believe that God can be something as simple as love between people and that everyone has a different viewpoint. And that is what makes the world so great!
Good luck!