The hack has the potential to be one of the biggest of the year, but the edtech giant is refusing to answer important questions

The hacker who breached education tech giant PowerSchool claimed in an extortion demand that they've stolen the personal data of 62.4 million students and 9.5 million teachers, BleepingComputer has learned.

PowerSchool, a software provider popular at K-12 schools, was the target of a data breach in late December that affected many districts in the U.S. and in other countries, according to the company and several impacted schools .