I would think this would fall under the “wall of separation between church and state” policy if it’s a public school. If you can’t promote religions you shouldn’t be able to attack it, either. I’d be interested in what an attorney has to say.
In any case, by saying what he did the teacher is showing how gullible or naive he is. You can’t “disprove” religious tenets in the laboratory. If you could, it would have been done by now. Instead, arguments for evolution are often weak and thin and only win the day because the proponent speaks more loudly and forcefully.
I’m guessing this teacher is a blow-hard who can easily be out-reasoned. This could be interesting.
Ask the teacher if the class can watch the South Park episodes on Evolution and Atheism. It will shut him up quick.