We're building an interactive coding screencast tool (called Scrimba) to help people with teaching and learning stuff like JS and React.

A dedicated section for React can be found here: https://scrimba.com/topic-react

And here is a playlist which takes you through building your first React app: https://scrimba.com/playlist/playlist-1

It's based upon an article I wrote here: https://scrimba.com/playlist/playlist-1

It's all free. Hope it helps!