Technology Tidbits: short posts and videos on how to setup and use your first Google Classroom
Technology Tidbits Videos : Short 2 minute videos on Google Classroom (click on the link, then type Classroom in the search to narrow down to just Classroom tidbits)
Google’s Teacher Center: tutorials on starting up your Classroom from Google's Teacher Center
How to Use Google Templates and Assign in Google Classroom (Shake Up Learning)
Kami: PDF & document annotation app for schools; can be used in Classroom