Well I don't like the term creationism as most ism's are not good, so it seems.
I also believe public (government) schools should be abolished, and all government funding of schools banned.
Teaching creation in government schools only works if Christian teachers who really adhere to creation do the teaching, but government schools are a bad ides so...
There is no clause for separation of school and state. Only the clause that the federal government shall not establish a religion, but they essentially have, that of atheistic evolution by their up-until-recent-decades compulsory attendance laws.