What is the extent of a teacher's authority?

Surely the framers of the Establishment Clause of the constitution did not intend teachers to abjure the teaching of right and wrong, for that is what morals are about. Neither the founding fathers nor any of the Justices of the Supreme court have interpreted the separation of religion from government in that way. Do you think even Thomas Jefferson, who had much to say on the Establishment Clause, would have advocated the condonement of lying as you suggest? You can't sit on the fence in regard to morals education. If you don't condemn lying then you condone it and by condoning it you are actually teaching it. Indeed the government makes laws based on morals. By your logic the government is transgressing the Establishment Clause of the constitution because it is advocating morals through its laws and, according to you, morals are the strict preserve of religion.