This semester I have heavily stressed online discussion since many college classes require it. You can use Blackboard, Edmodo, or a number of other sites and services. This includes prompts and, on a few, sample posts. I have also included a rubric to grade them and the subsequent replies. Aligned to Common Core State Standards: W.9-10.1 , W.9-10.4, SL.9-10.1
Initiate and participate effectively in a range of collaborative discussions (one-on-one, in groups, and teacher-led) with diverse partners on grades 9–10 topics, texts, and issues, building on others’ ideas and expressing their own clearly and persuasively.