diff --git a/ch04/js/scope_template.js b/ch04/js/scope_template.js
index 6cdadfd..bf8db62 100644
--- a/ch04/js/scope_template.js
+++ b/ch04/js/scope_template.js
@@ -3,7 +3,7 @@ angular.module('myApp', []).
     $scope.valueA = 5;
     $scope.valueB = 7;
     $scope.valueC = 12;
-    $scope.addValues = function(v1, v2, e) {
+    $scope.addValues = function(v1, v2) {
       var v = angular.$rootScope;
       $scope.valueC = v1 + v2;
     };
diff --git a/ch04/scope_template.html b/ch04/scope_template.html
index 02d915b..20d5bfd 100644
--- a/ch04/scope_template.html
+++ b/ch04/scope_template.html
@@ -9,7 +9,7 @@
       ValueB: <input type="number" ng-model="valueB" /><br><br>
       Expression: {{valueA}} + {{valueB}}<br><br>
       Live Expression Value: {{valueA + valueB}}<br><br>
-      <input type="button" ng-click="addValues(valueA, valueB, $event)"
+      <input type="button" ng-click="addValues(valueA, valueB)"
         value ="Click to Add Values {{valueA}} & {{valueB}}" /><br>
       Clicked Expression Value: {{valueC}}<br>
     </div>
diff --git a/ch05/js/filter_sort.js b/ch05/js/filter_sort.js
index 9fb0123..7a34c59 100644
--- a/ch05/js/filter_sort.js
+++ b/ch05/js/filter_sort.js
@@ -17,7 +17,7 @@ angular.module('myApp', [])
       $scope.reverse = !$scope.reverse;
     };
     $scope.filterString = '';
-    $scope.setFilter = function(value){
+    $scope.setFilter = function(){
       $scope.filteredPlanes = 
         filterFilter($scope.planes, $scope.filterString);
     };
diff --git a/ch06/directive_form.html b/ch06/directive_form.html
index a9d14d4..2a851e1 100644
--- a/ch06/directive_form.html
+++ b/ch06/directive_form.html
@@ -8,7 +8,7 @@
     <h2>Forms Directives</h2>
     <input type="text" ng-model="someText"> {{someText}}<hr>
     <input type="checkbox" ng-model="cbValue"
-           ng-true-value="AWESOME" ng-false-value="BUMMER">
+           ng-true-value="'AWESOME'" ng-false-value="'BUMMER'">
     Checkbox: {{cbValue}}<hr>
     <input type="radio" 
       ng-model="cameraName" value="Canon"> Canon<br/>