Creatubbles is an excellent for sharing/collaborating on outwork in an educational setting. The educational portal allows educators to create, manage, and monitor student accounts making it safe for classrooms. Also, students can comment (pending moderators approval) on other student's outwork from around the world and use Creatubbles on any device. Best of all, all artwork that is uploaded to Creatubbles is reviewed before being displayed on their website.
I highly recommend checking out Creatubbles by clicking here!!!
Below is a brief demo...
For my Pinterest board on Digital Art click here.