Asynchronous groups can be all of my class, whereas chats and single student discussions should be 1-6 students. I hope to schedule regular chats as well as respond at a minimum of once per week with each student online. I may have to combine my responses since I do have some students more than once in a day for diferent courses and some courses are offered multiple times during the day. I think that I will use Edmodo for my communication as I have done thus far and make sub-groups for classes, but keep the whole course (even if over several class periods) under one class title so that students who are taking the same class but during different cvlass periods can communicate and share.
