Free

The Beginner’s Guide to React

If you’re new to React this is probably the best place to start. The instructor, Kent C. Dodds, is a prolific JavaScript teacher and this is an hour-plus guide to the basics.

React Fundamentals - Full Course for Beginners

From FreeCodeCamp an hour-long introduction to React and its major concepts.

React for Beginners

From Wes Bos, probably the most well-known React course out there. It is a little on the pricey side but Wes’s conversational style of explaining React and JavaScript demystifies a lot of the confusion for newcomers.

React Fundamentals

An exceptionally well explained introduction to React. The author, Tyler McGinnis, has additional courses on React Router v4 and Redux that I also recommend.

React 16 For Everyone

Scott Tolinski of LevelUp Tutorials has a friendly way of explaining even the trickiest React concepts. There are additional courses on Redux, React Testing, and Intermediate React that are also worth exploring.

Complete Intro to React

Frontend Masters has solid content and this course by Brian Holt is a detailed look at React via building a Petfinder web app. He also has an Intermediate React course that covers testing and more advanced React concepts.

Taming the State in Redux

The screencasts version of the excellent book.