TodaysMeet is great way to extend your presentation or classroom lecture through backchanneling.  Find out what backchanneling is here.  This is a great tool because it takes the conversation to a new level.  It works a lot like Twitter in the fact that you only have 140 characters to write a response or question.  TodaysMeet is so simple to set up — just go to the website, enter your room name, decide how long this room will stay open for and thats it, your done!  I encourage you to use TodaysMeet soon and best of all its FREE!