Our Academy have used Edmodo in some BTEC subjects and have found it an excellent resource. Students can download an APP that they use on their smart phones. They have commented on stimulus and generally supported one another through it. It has definately worked well here. Another excellent tool is voice thread, which allows you to upload a document and the students can then comment on this 'live', you will see the slide on the computer, with lots of little comments around the slide, that the students are making. They can add a voice comment or a video. I havent used it yet, but I have seen it work and the students need practice on it, but it works well
Gem