Didacto: JavaScript is a web site that teaches JavaScript using a set of tutorials (currently covering just the basics). What makes didacto unusual and interesting is that the tutorials include questions that can be answered and automatically evaluated. If you get a question wrong didacto can tell you and also tell you why.
The executable tutorial idea was borrowed from the excellent School of Haskell. In a way it is the natural evolution of my old JavaScript Koans project.
I started with JavaScript because the server component of Didacto is written in JavaScript so that was easiest but I would like to extend the same idea to C# and other languages if it seems worthwhile.
