I guess you missed all the hubbub about Islam being taught in public schools.
Does Google work for you, or is it broken?
So Islam is taught in a history class, therefore a teacher should be able to talk about their religious beliefs.
I really don’t think you would like that.
An example.
Would you like a Calvinist trying to convert your child?
What about a Catholic? Jehovahs’ Witness? Southern Baptist? Methodist? Mormon? Presbyterian? Lutheran? Jewish? Eastern Orthodox? Greek Orthodox? Pentecostal? A.M.E.? Black Muslim? Maronite? Unitarian? How about the Moonies, do you want them ‘educating’ your children.
I’m sure one (if not most) of these religions are objectionable in some way to your religious principles...
So what brand of Christianity would be acceptable to you?