This isn't a Christian school?
The woman had taught at a Christian school before, but browsing the school's website, I can't find anything that would indicate that this was a religious institution of any sort. Browsing the course list, which is available online, the only course with any religious content is a "world's religions" class.
The title of the thread should be changed, it's false and inflammatory.
If you read it 'Christian School' then it would be, but it's clearly supposed to read; 'School Principal, who is Christian'
Not really, because it would be redundant in everyday language (at least in the U.S.) to say someone is a "school principal." Those words in that order are almost exclusively used following the type of school of which they are a principal. As in: "high school principal" or "middle school principal." To say "Christian school principal," in the normal sense that the term would be used, is to say that they are the principal of a "Christian school."
The story would be far more shocking and damning of the institution if it were a Christian school, rather than an idiotic redneck woman with some kind of attachment to folk Christianity saying "the Devil made me do it!"