The tutorials are interactive and live entirely in the browser. Instead of a video, each lesson contains a pane on the left side for students to enter code and a pane on the right that displays the output. The first lesson walks students through the process of writing code that will draw a face in the right pane. After learning to generate graphics, students work up to animation and eventually to games, such as a Pac-Man clone.
via Coders Get Instant Gratification With Khan Academy Programming | Wired Enterprise | Wired.com.
Interactive tutorials, not videos like previous lessons. Immediate feedback on code chance (without recompiling!).