I would try making a FOIA request for the survey—on the school district's website, there's a link for requests: http://www.bps101.net/node/936
If the gatekeepers don't provide the information (malicious compliance, obfuscation, foot dragging, denying request), you've got grist for the mill. EVERYONE supports "open government" and will support your efforts.
It's best (PR wise) to get the incriminating information after a long drawn out fight.