In collaboration with CodeSchool, John refactors pieces of the CodeSchool Angular app into a more reusable directives.
For anyone who's looking for the code from the Code School course, you can find it on Plunkr: http://plnkr.co/edit/CmyT5C?p=preview
Then you can follow along with John's awesome tutorial here on egghead.io to extend the functionality.
Hope this helps!
Thank you Bijan.