Classroom Management G+ Unblocked: Maximizing Engagement and Restoring Control
Here is a guide on how to balance digital freedom with structure, using Google tools effectively and managing the "unblocked" phenomenon.
Randomly walk around the room and ask students to show their open tabs. If they have games open, have a pre-established consequence (e.g., loss of computer privilege for the day). Knowing you might check at any moment is a strong deterrent.