https://drive.google.com/file/d/1yQoDofsxzfQM1co0kCF6KP39OfjU4CBm/view?usp=sharing
Flipgrid instructions for students: how to use FlipGrid (1:49)
https://drive.google.com/open?id=1tGzl3agu7yV3c1KpBvReUmRTWcdhXskF