Louis Gomez: Video Traces is a system that makes it easy to capture a piece of rich digital media, such as video or a digital image, and to annotate that media both visually (using a pointer to record gestures) and verbally. The resulting product is a "video trace": a piece of media plus its annotation--in essence, a recorded "show & tell". Traces can be viewed by their creator, exchanged with others, and further annotated for a variety of teaching and learning purposes.

Video Traces provides a unique opportunity to capture embodied knowledge and educational interactions by supporting the most common ways people communicate their ideas--through talking, showing, and pointing.

http://faculty.washington.edu/reedstev/vt.html