Here's some more info:

CPS takes test info off web | Cincinnati Enquirer | Cincinnati.Com

Cincinnati reuses identical test questions year after year, (Science teacher Paul) Perrea said. So students who go online - or teachers who prep students using the online guides - can gain an unfair advantage.
Doesn't that argue against his case to make the tests public? Reminds me of the college frat houses that have files of previous tests for many classes...
A petition signed by Perrea and about 60 Cincinnati teachers said they want details on the "creation, administration and grading" of CPS semester examinations so they could get an outside expert assessment of the "fairness, accuracy and validity of the exams."
Couldn't they get that done without making the tests public?