I imagine most people here are not working in K-12 education and so are not familiar with these issues, but it should be understood that many public school districts are making use of Google Apps for education in a capacity which is either explicitly or implicitly compulsory for students, including creation of private accounts on minor students' behalf.
If Google is not being entirely forthcoming on precisely what personally-identifiable information they are retaining about minor students they are potentially in a great legal mess here.