A system that thousands of schools and universities use to support instruction was back online Friday after it went down during a cyberattack that created chaos as students tried to study for final exams.

A system that thousands of schools and universities use was offline Thursday during a cyberattack, creating chaos as students tried to study for finals and underscoring education’s dependence on technology.

A system that thousands of schools and universities use to support instruction was back online Friday after it went down during a cyberattack.

The ShinyHunters gang placed a widely-seen extortion note by hitting Canvas, an online education system used by thousands of institutions. The disruption occurs as many schools hold finals.

It’s finals season across many U.S. schools and universities, but for some students and teachers, the already stressful period has been aggravated by a cyberattack on a widely-used learning system that could put at risk the personal information of millions of its users.

Canvas, a learning management system used by thousands of schools and universities, was knocked offline by a cyberattack on Thursday, preventing scores of students from completing assignments and studying for final exams.

Canvas appears to be coming back online following a nationwide cyberattack. On Thursday, students and staff at thousands of schools across the country were unable to access the site, which is

Shinyhunters, the hacking group that claimed responsibility for the attack, claimed in a ransom note it had obtained data on millions of people.