Well, I'm not going to defend the school's subsequent handling - the school was wrong to publish the information to other teachers and parents. On that account, the school will probably stand to take a sock for a good deal of cash. My main point is that the school was entirely in the right to fire her for violating her contract.
What gets me is that if she had been fired for smoking pot or being a lesbian, most of the same goobers who are on here spouting their pious nonsense about "judge not" in anger that a Christian school would uphold one of the moral convictions that its teachers agree to when they sign the contract would be jumping all over it saying the school was absolutely right for upholding these other moral standards (and the school would have been right, btw).
Just goes to show how subjective and self-selected a lot of Christians' morality really is. That's a lot of the reason why this country is where it is today.