Lesson 3 - Controller
Lesson 4 - Sharing Data

Note: You must have the FirstCtrl and SecondCtrl defined in main.js to
get rid of the undefined error that may come up if you are following
along in the video
Lesson 4 P2 - Sharing Data

Finished
Lesson 5 - Defining a method on the scope
Lesson 6 - Filters
Lesson 7 - ng-repeat and filtering data