A recent hack of the educational platform Edmodo compromised tens of millions' user records and led to the revelation that the company was not only using ad trackers to monitor student and teacher behavior, but then forwarding the data to data brokers. The company issued a statement saying it is investigating the security breach and it has removed the "problematic" ad-tracking code from its platform. Edmodo is a platform that 78 million teachers, students and parents use to communicate about homework and lesson plans, and more.