The movie
An animated summary of every lesson in this guide
Watch a stack test from the first plan to the final report, with a narrator reading each caption. Each scene comes from a lesson, and the chapter list jumps straight to any part of the test.
Watch
Pick a step to explore
The voiceover uses your browser’s built-in speech, so the voice depends on your device. When the narrator needs a little longer, the picture holds on that scene until the line is finished. Turn it off with the speaker button or the V key.
Chapters
Transcript
The narration from every scene, with a link to the lesson that covers it in depth.