What they found was that little work has been done to protect the privacy of the student information that is collected from both the classroom and from using the online software the schools issue for use at home on the students' own devices. They found that while many school districts have embraced technology and all of the benefits it can bring to the schools and students, often little thought has been given to one of the unintended consequences of this: the students' privacy.
The study was very extensive and took two years to complete. Virtually everything was examined, including what's being done along each point from the suppliers of hardware and software and the cloud services, to the schools and the students. They found that lots of data is being collected without permission and that it's easy for outside companies to access the data. They also discovered that there's little to prevent suppliers from sharing data with others, including advertisers.