https://techcrunch.com/2019/07/31/education-software-maker-pearson-says-data-breach-affected-thousands-of-accounts-in-the-u-s/

Pearson, the London-based educational software maker, said today that thousands of school and university accounts, mostly in the United States, were affected by a data breach. The company added that it has notified affected users already and that the vulnerability has been fixed.

The Wall Street Journal reports that the data breach happened in November 2018 and Pearson was notified by the Federal Bureau of Investigation in March. The perpetrator is still unknown.