Here is a little background.
The actual policy is written to allow discussion in the classroom, which apparently wasn't the case prior to the policy's enactment.
I was at the school board meeting where this was "discussed," and it's a good thing we had a large, off-duty LEO present (along with some uniformed officers, as the meeting place was right across the street from the PD HQ).
What happened at the meeting that you would need the protection of uniformed police???