Here’s a quick tip on how to set a checkbox as checked by default when developing an app with AngularJS. In your controller, suppose you’re storing the form in a field someCheckboxField under a form variable someForm. All you need to do is set the field to true
e.g.
$scope.someForm = { someCheckboxField: true };
Then in the template, make sure the checkbox has ng-model set appropriately, e.g.
<input type='checkbox' name='someCheckboxField' ng-model='someForm.someCheckboxField' />