Swirl

Learn R in R. Swirl teaches you R programming and data science interactively, at your own pace, and right in the R console! Swirl is a platform for learning (and teaching) statistics and R simultaneously and interactively. It presents a choice of course lessons and interactively tutors a user through them. A user may be asked to watch a video, to answer a multiple-choice or fill-in-the-blanks question, or to enter a command in the R console.