Comment Bubble is a neat little site that I just found out about from Ozge Karaoglu on Technology & Learning. The way this works is a user uploads a video and then selects what kind of feedback/comments they want to allow. Once this is done a person can then leave text, audio, or even video comments to any video. This is a great way to carry on a discussion about a video, as well as generate interactive graphs. Finally, a teacher can use this to flip their classroom/lesson to assess how well a student understands their topic.
I highly recommend checking out Comment Bubble by clicking here!!!
For my Pinterest board on a Flipped Classroom click here.