Edmodo

I'm curious to know if other teachers use "online classrooms" such as Edmodo, and if so, what are they and how do you use them? I have used Edmodo since the very beginning of the school year and have found it to be an absolutely amazing tool for various reasons: 

• Builds a kind and caring classroom community where students can talk to each other, share information, compliment each other, and find common interests (every student and parent signs an agreement at the beginning of the year explaining what it IS and ISN'T supposed to be used for and consequences for when rules are broken)
• Saves paper! Homework can be posted on Edmodo, whether it's a link to a game or article, or an assignment they can do on the computer and then upload again back onto Edmodo
• Communicate with parents - parents can create an account as well, where they can monitor what their child does/says online 
• Networking opportunities!!! We participated in the Global Read Aloud (I highly suggest it!) and connected with a classroom in another country to discuss the book we were both reading, and share thoughts, opinions, and activities

Please share if you have any other thoughts or ideas on online classrooms.