Some courses have VoiceThreads which are interactive assignments where you will view a presentation, then add content of your own, and then comment on content added by other students. Below, you will find a walk through and a list of frequently asked questions regarding VoiceThreads.
You can also find a video walk through here.
If you are using a mobile device, you can find instructions on getting the mobile app here.
For VoiceThread to work, you have to have Flash installed and enabled. For more information on Flash, please check here.