Question: What does the church say regarding creationism being taught in a science classroom?

The Magisterium (teaching authority) of the Church has not come out with an “official” pronouncement that would answer your question definitively. However, the Church has much to teach about the theory of evolution, science and faith. In fact, if you look in Archives #1 and #2 of the Q&A section of this web site, you will see 2-4 questions dealing with this subject. Another resource would be the document “Fides et Ratio” (Faith & Reason) written by the late Pope John Paul II. I highly recommend it.