Chromebooks: Turning off the Auto-launch feature on Google Hangouts App
Google hangouts has a lot of wonderful educational uses, but it can also be a big distraction. One way to help minimize that distraction is to have students turn off the "Auto-launch" feature. By turning this off, Google Hangouts will no longer launch every time a student logs into the chromebook.
Now you can choose when you want your students to open hangouts in order to collaborate and share, instead of it being a constant distraction!