Accessible supplemental materials delivered with video, part 2

Apologies for the cross-posts.

With funding provided by the Reader's Digest Partners for Sight Foundation, the National Center for Accessible Media at WGBH (NCAM) is continuing its experiments with the Popcorn.js HTML5 Media Framework to deliver screen-reader accessible supplemental materials alongside video embedded in a Web page.  You can read about the project and see our second prototype demonstration at http://ncamftp.wgbh.org/rd/quadratic/<http://ncamftp.wgbh.org/rd/hgp/> .  This new prototype is focused on accessible math.  Read the instructions and system requirements, then watch the video to see (and hear) accessible math displayed as the video progresses along its timeline.

There are links on the site for feedback; we encourage you tell us what you think of what we've done so far.

Thanks very much.
Geoff Freed
WGBH/NCAM