"Schools don't buy software based on privacy"They should do in my opinion. I find it depressing that so many people overlook or dismiss privacy concerns, particularly where kids are concerned.
The kids who are asked to use Google classroom have no choice in the matter since the decision is made by the school. That means they must sign up for a Google Account regardless of whether they want one. It's the responsibility of the adults to evaluate the impact of the software they choose. And privacy should be one of the top concerns for anyone evaluating software for educational use in my view.
Google's educational privacy policy [1] is carefully worded to state that they do not mine the content you upload to Google classroom ("Your data is yours"). What they don't state is whether they track the activities of school students and what this actually entails. How is that data aggregated? Who sees that data inside Google? Is the data anonymised? Or is it tied to an individual student?
Given that you must enter a date of birth to create a Google Account, Google is capturing very specific and personal details of thousands, perhaps millions of students. Over time, Google will have amassed a staggering amount of information about the behaviour and activities of these students and will continue to do so into their adult lives (if the students continue to use their Google Account).
If Google isn't tracking the online activities of Google classroom users, why do they not simply state that?
[1] https://www.google.com/edu/privacy.html