AAM currently has explored the use of Showbie for workflow in Grades 3-5. Next year we hope to be making use of this tool from Grade 1-6 for workflow and digital portfolio purposes.
It is one of the easiest apps to use to assign, collect and review student work. Try it, you'll be pleasantly surprized.
Secondary teachers and students have promoted online learning and collaboration through Edmodo.
Here is a link to questions asked at the Summer Edmodocon 2014 where teachers come together via webinar all over the world and share ideas about using Edmodo in the classroom.