Very good tutorial. Too bad I didn't have this when I was learning JASS. There are some small grammar errors, but thats ok.
There is one very minor error, and it isn't even that big of a deal, but
* Challenge 4: Show as many numbers of the fibonacci sequence as possible:
0, 1, 1, 2, 3, 5, 8, 13, 21, 44, ...
Actually, the fibonacci series starts at 1, not 0.