This course makes use of narration and dynamically generated page content, including animations. To make the material accessible to other users we have designed a closed captioning alternative for either the hearing impaired or users in an environment where audio is impractical or unappreciated.
While viewing the course, click on the "CC" button in the upper left-hand corner of the screen to bring up the closed caption window. You may then disable or turn down the sound on your computer.
We have also prepared a text-only alternative for users who rely on assistive technologies. The text-only version is also suitable for narrowband Internet connections. Use the "text-only" links at the end of the lesson descriptions on the Start the Course page.