Comment Teach JavaScript (Score 1) 452
It's the coolest and most interactive language -- most immmediately available (in every browser), and you get immediate and gratifying feedback (seeing results and interacting in your browser).
And it's cool because the JavaScript language itself has understandable structure, with an ultramodern approach to functions, scoping, and objects. Use the excellent book "Javascript: The Good Parts".
With a WebDAV server like LimeBits.com (disclaimer: I work there), you get automatic state storage and data storage, which overcomes limitations of running in the browser. LimeBits is an execution platform for open-source JavaScript, as well as a free storage server.
