Project Euler's 500th problem
I absolutely love project Euler. The math on the harder problems is way over my head but it is still my go-to site whenever I want to learn a new language. By the time you've done a bunch of them you'll be more than underway in understanding the territory and in a much better position to understand tutorials (which inevitably are written by experts in the language and usually make a ton of assumptions).<p>Alternating between project Euler, a book (or two), back to project Euler for a bit is a very fast school, and you determine how fast you can pace yourself.