I believe you're posting this because you want the problems fixed; but in order for that to happen, you need to make it happen. There are a variety of escalation strategies to consider: you might go to your state's secretary of education; you might go to your state's attorney general; you might go to the press. Note that NDAs usually do not hold up when you're making accusations of criminal activity, and some of the accusations you have made are criminal in nature. There are "whistleblower protection" laws, which vary from state to state. Also note that if someone is your lawyer, then you have the absolute iron-clad right to tell them everything ("attorney-client privilege") regardless of what you may have signed. And if what you say is true, then there are probably quite a few groups that would happy to provide you with a lawyer, or lawyers that would work on contingency. In any case, talking to a lawyer should be your next step before taking any major action; it's just a question of which one.

Your career as an auditor that people pay to evaluate themselves is completely doomed and you should sacrifice it before it explodes. Your career as an auditor that people pay to evaluate others has promise.

Also, you should realize that having a scandal ready to release in a controlled fashion gives you some powers, and you should think carefully about what your objectives are. Depending on the location, size, spin and time of release, you can take out any one person of authority, possibly (but not necessarily) as high as the state governor. If you have political savvy, you might maneuver into a position of authority yourself.

(To all the other commenters in this thread: this is one of those cases where you should be providing actionable options to the original poster, not going meta, not expressing outrage, not trying to collect the information to act in his place. Comment as a consequentialist, not as a conversationalist.)