I would have loved to have something like this while I was teaching. It looks like it would be a lot of fun to work with!
Google Classroom Launches Chrome Extension So Teachers Can Instantly Share Links With The Entire Class
Google calls Classroom a “mission control for teachers,” allowing them to access all of Google Apps for Education within one central place. Teachers can use the product to chat with students, help students with their work and keep track of the daily goings on in the classroom.
LINK: http://techcrunch.com/2015/09/02/google-classroom-launches-chrome-extension-so-teachers-can-instantly-share-links-with-entire-class/