The hacker behind a breach at education technology giant Instructure claims to have stolen 280 million records tied to students and staff from 8,809 colleges, school districts, and online education platforms. Instructure is a cloud-based education technology company best known for its Canvas learning management system, which schools and universities use to manage coursework, assignments, grading, and communication. Last Friday, Instructure disclosed that it was investigating a cyberattack and la...