Directive

function MyDirectiveController($scope){
	var vm = this;
	// bind in GUI
	vm.value = $scope.ngModel.value;
}

function MyDirective(){
	return {
		templateUrl: '/my/template.html',
		scope: {
			ngModel = '='
		},
		controller: MyDirectiveController,
		controllerAs: 'my'
	}
}

angular.module('acme').directive('myDirective', MyDirective);