Google Classroom is now available to users without G Suite for Education accounts. Teachers and students in many different environments can now teach or attend classes, manage assignments and instantly collaborate—all with their personal Google accounts.
G Suite for Education administrators will see updated Classroom settings that give them new controls over who can join their classes from personal Google accounts or from other G Suite for Education domains. This update gives schools more flexibility in how they collaborate with other organizations and students: For example, student teachers or visiting students can now easily integrate into their host school or university’s Classroom set-up.
To learn more about this, visit the Google for Education official blog post.