Probably nothing. Using the Bible as the basis for a history course is a good way to get kids interested in history. There is always the chance that one of the teachers will get carried away and start evangelizing instead of teaching, but if a student asks the teacher what he believes, I'd prefer an honest answer to having to dodge the question (me teaching the history of the Bible will likely have a different focus than that of a fundamentalist Baptist), as I'd like the students to know the bias of their instructor.

I will say one thing though: The removal of the Bible and prayer from schools has far less to do with a (perceived) increase in problems than both parents working outside the home and mass media coverage of every incident that happens anywhere. When kids enter school without knowing the alphabet, they're already behind. Parental responsibility is mostly a thing of the past.

Finally, the U.S. wasn't founded on Biblical principles, although, obviously, some of the Founding Fathers were religious men. Most of the founding fathers were deists rather than Christians, and connecting Biblical principles to sections of the U.S. Constitution isn't an easy thing to do. The Bible is largely about obedience to God, while the Constitution is based on freedom--almost the exact opposite concept.

Topher