Exercism v3 launched today: https://exercism.org/ We'll be rolling out the new Concept Exercises in the next couple of weeks. In-browser analysis tooling is also being developed, and contributions are welcome. It's an especially nice opportunity for those who have learned to code but want to gain experience being part of a large distributed team. When this project started I'd never witnessed an open-source project of this magnitude, but after nearly 2 years it seems much less intimidating.