Answer 1

AngularJS does work in the playground.

If you kindly provide more details regarding the error (or the code itself) we may be able to help.

Answer 2

1) changed ng-app="radio" to ng-app
2) changed ng-bind="station" to ng-model="station" in the input element
3) removed 2nd ng-bind in the span element
4) added {{station}} inside the span tag so it can be displayed in the view

https://code.sololearn.com/WvcDBK63C3e9/?ref=app

Answer 3

I think it's because you define ng-app="radio" without defining a radio module in javascript to control it (i'm really rusty in AngularJS)

Try following these lessons, and play around with the examples:

https://www.sololearn.com/learn/1017/?ref=app

you can also look around for examples in the code playground:
https://code.sololearn.com/WRtLA8r2uzWy/?ref=app
https://code.sololearn.com/WaAAK4bi8KuY/?ref=app
https://code.sololearn.com/WfM7KYj8DwJm/?ref=app