Learning the Fundamentals of R, Made Fun

For those of you new to R, or just curious, there is a fantastic interactive online resource for learning the fundamentals; and even those who have used R for a while may find it useful for refreshing and revitalizing their knowledge. The interface is slick (I use that word deliberately), offering incentives for completing each stage of a particular R concept or command by tracking your progress and showing how far you have come and how much farther you have to go. Finally, at the end of the day you can earn badges showing that you have successfully mastered, say, matrices and data frames, which roughly translates into getting laid anytime you want.

As some of you may know, I tried do something similar; but after a few abortive attempts at creating tutorial videos, I have decided to leave this to the experts. "Then why didn't you leave singing to the experts, instead of making a giant ass of yourself at karaoke night and picking a song by Four Non-Blondes?" Champions dare to fail.