Here is a nice site that was released today it is about interactive learning of data mining using R:
DataMind is a young team of data analytics enthusiasts that provides free interactive data science and statistics education to the world. We do not believe in an educational framework that centers on passively reading books, or on watching YouTube videos that put a focus on the instructor, and not the scholar. The best way to learn is by doing; therefore this online interactive learning platform is tailored to hands-on experimentation in the browser.
Our current course "summer of R" focusses on data analytics with the help of the open source statistical language R and targetted at beginners. In the future, we will provide courses for both the novice and the experienced data scientist, and the patform will even allow passionate users to create their own interactive courses for free!
Our mission is to empower everyone to become a data analytics expert for free! To achieve that, we are and will be working non-stop to deliver anyone, teacher and student, with the best learning experience for data science and statistics.