Google Apps for Education Support
A few years ago I started writing tutorials for staff. I should've known better because as soon as I published something, something changed. So I have become really fond of Google's resources. I update these links and videos often to accommodate to common questions.
GAFE Support Links
There are a ton of great add-ons out there or extensions in the Chrome store. These are a few of my favorites - Doctopus & Goobric. I must say, they did the best thing possible by integrating with the Google Classroom.
Doctopus + Goobric + docAppender + Google Classroom
GAFE BASICS VIDEOS