Google ACE

[origamishuttle]

I won't say how fast I finished it, but I'm pretty sure I would have finished in 1 day if I had started in the morning and gone all day, only completing the required quizzes, labs, and written assignments, even spending a little extra time on the writing for fun. The vast majority of the estimated time is for people new to the material that actually need to learn it. Just like a video game speed run, if you know the material already, then it can go very fast.