quote [ Sometimes they’ll use the service’s live-chat function, which doesn’t open by default, and which many teachers don’t even know exists. Or they’ll take advantage of the fact that Google allows users to highlight certain phrases or words, then comment on them via a pop-up box on the right side: They’ll clone a teacher’s shared Google document, then chat in the comments, so it appears to the casual viewer that they’re just making notes on the lesson plan. ]