Rust in 100 bite-sized lessons.
Please go to the wiki for a list of lessons.
This wiki closely follows the official Rust Programming Language book, Rust by Example. The book is much more thorough and complete than this wiki. This wiki is meant to be a quick reference for learning Rust.
While working through the lessons, the Rust Playground is a great place to experiment with Rust code. It's a simple web app that allows you to write Rust code and see the results immediately.