Google Classroom is a learning management system for schools to help simplify creating, distributing and grading assignments with the aim to create a paperless educational system. (Source)
Want to access Google Classroom on a smart phone or tablet? Download the app
Edmodo is a social networking site for teachers, students, and parents, like a “Facebook for schools.” Students and teachers can communicate in a closed, invitation-only online space. (source)
Students and parents can create free Edmodo accounts with or without a personal email address.
Want to access Edmodo on a smart phone or tablet? Download the appTop