diff --git nodeapi_example/nodeapi_example.module nodeapi_example/nodeapi_example.module
index cf6f1c1..158f121 100755
--- nodeapi_example/nodeapi_example.module
+++ nodeapi_example/nodeapi_example.module
@@ -18,10 +18,10 @@
  * changes to two types: a node's content type configuration and edit forms.
  *
  * We need to have a way for administrators to indicate which content types
- * should have our rating field added. This is done by inserting a checkbox in
+ * should have our rating field added. This is done by inserting radios in
  * the node's content type configuration page.
  *
- * Changes made by this hook will be show when editing the settings of any
+ * Changes made by this hook will be shown when editing the settings of any
  * content type.
  *
  * Optionally, hook_form_FORM_ID_alter() could be used with the function name
@@ -50,10 +50,12 @@ function nodeapi_example_form_alter(&$form, $form_state, $form_id) {
       '#description' => t('Should this node have a rating attached to it?'),
     );
   }
-  // If the type and node field are set this may be a node edit form.
+  //Here we check to see if the type and node field are set.
+  //If so, it could be a node edit form.
   elseif (isset($form['type']) && isset($form['#node']) && $form['type']['#value'] . '_node_form' == $form_id) {
     // If the rating is enabled for this node type, we insert our control
-    // into the form.
+    // into the form. We could add it into the additional settings by using the 
+    // format we used in the configuration form above.
     $node = $form['#node'];
     if (variable_get('nodeapi_example_' . $form['type']['#value'], FALSE)) {
       $form['nodeapi_example_rating'] = array(
@@ -72,19 +74,19 @@ function nodeapi_example_form_alter(&$form, $form_state, $form_id) {
  * hook_nodeapi() has been replaced in Drupal 7 with a set of different hooks
  * providing the same or improved functionality.
  *
- * The replacement functions providing access to events ocurred to content in
- * Drupal is listed below, and detailled in the following location:
+ * The replacement functions providing access to events affecting nodes in
+ * Drupal is listed below, and detailed in the following location:
  * http://api.drupal.org/api/group/hooks/7
  * or in the node API declaration file: modules/node/node.api.php
  *
  * hook_node_access()	- Control access to a node.
  * hook_node_access_records()	-	Set permissions for a node to be written to the database.
  * hook_node_access_records_alter()	-	Alter permissions for a node before it is written to the database.
- * hook_node_build_alter()	-	The node content was built, the module may modify the structured content.
+ * hook_node_build_alter()	-	Modify structured content after content built.
  * hook_node_delete()	-	Act on node deletion.
  * hook_node_grants()	-	Inform the node access system what permissions the user has.
  * hook_node_grants_alter()	-	Alter user access rules when trying to view, edit or delete a node.
- * hook_node_info()	-	Defines module-provided node types.
+ * hook_node_info()	-	Define module-provided node types.
  * hook_node_insert()	-	Respond to node insertion.
  * hook_node_load()	-	Act on node objects when loaded.
  * hook_node_operations()	-	Add mass node operations.
@@ -106,8 +108,8 @@ function nodeapi_example_form_alter(&$form, $form_state, $form_id) {
 /**
  * Implements hook_node_validate().
  *
- * Check that rating attribute is set in the form submission, the field is
- * required
+ * Check that rating attribute is set in the form submission, since the field is
+ * required. If not, send error message.
  */
 function nodeapi_example_node_validate($node, $form) {
   if (variable_get('nodeapi_example_' . $node->type, FALSE)) {
@@ -125,18 +127,18 @@ function nodeapi_example_node_validate($node, $form) {
  */
 function nodeapi_example_node_load($nodes, $form) {
   foreach ($nodes as $node) {
-    // We are using the revision id instead of node id
+    // We are using the revision id instead of node id.
     if (variable_get('nodeapi_example_' . $node->type, FALSE)) {
       $vids[] = $node->vid;
     }
   }
-  // Check if we should load rating for any of the nodes
+  // Check if we should load rating for any of the nodes.
   if (!isset($vids) || !count($vids)) {
     return;
   }
 
-  // When we read, we don't care about the node->nid, but we look for the right
-  // revision ID (node->vid)
+  // When we read, we don't care about the node->nid; we look for the right
+  // revision ID (node->vid).
   $result = db_select('nodeapi_example', 'e')
   ->fields('e', array(
         'nid',
@@ -189,15 +191,14 @@ function nodeapi_example_node_delete($node) {
  * As an existing node is being updated in the database, we need to do our own
  * database updates.
  *
- * Update is called when an existing node has been changed. Here, we use a
- * DELETE then an INSERT rather than an UPDATE. The reason is that a node
- * created before this module was installed won't already have a rating
- * saved so there would be nothing to update.
+ * We can't simply update, since the node may not have a rating saved, thus no
+ * database field to update. So we first check the database for a rating.
+ * If there is one, we update it. If not, we call nodeapi_example_node_insert()
+ * to create one.
  */
 function nodeapi_example_node_update($node) {
   if (variable_get('nodeapi_example_' . $node->type, FALSE)) {
-    // If may happen that this node does not have a previous saved rating
-    // value, so we can't just update it, we need to check first if this
+    // We need to check first if this node has a saved rating.
     $rating = db_select('nodeapi_example', 'e')
       ->fields('e', array(
         'rating',
@@ -206,7 +207,7 @@ function nodeapi_example_node_update($node) {
       ->execute()->fetchField();
 
     if($rating) {
-      // node has been rated before.
+      // Node has been rated before.
       db_update('nodeapi_example')
          ->fields(array('rating' => $node->nodeapi_example_rating))
          ->condition('vid', $node->vid)