At least three MetroWest school districts were affected by a nationwide data breach linked to the school software company PowerSchool .
Wellesley, Millis and Hopkinton were among the Massachusetts school districts affected by the data breach, which could have compromised school district information, including personal information about teachers and students.
In an email sent to parents, Wellesley Superintendent of Schools David Lussier and Director of Educational Technology Adam Steiner said they would investigate the breach…