Minnesota testing was briefly halted when Pearson servers became overloaded–were they not expecting so many students?–and a “denial-of-service” hacker broke into the system.

“An overloaded processor and a “malicious denial-of-service attack” led to the shutdown Tuesday of Minnesota’s statewide student testing system, the state’s testing contractor said Wednesday.

“Pearson, the testing company, apologized for the problems and said the system had been repaired. By late morning, though, Minnesota Department of Education officials were not yet ready to give the all-clear.

“We still need to hear from Pearson exactly what the issue is, how they have resolved it, and receive an assurance that testing can resume smoothly,” department spokesman Josh Collins said.”

In an age when hackers can break into the computer systems of major corporations, can Pearson expect to remain immune?