The Seattle Coder Dojo held a 6 session classroom session, hosted by Amazon.com, where the students learned how to create games using Phaser. The session notes, learning materials and all of the source code for the final game is available on GitHub.
The material is comprehensive, going from zero to complete space invaders game in 5 x 100min sessions. There's a lot of great content here, either for your own dojo or just to help yourself learn Phaser. The final game is surprisingly fun too :)