diff --git a/backup/moodle2/backup_zoom_stepslib.php b/backup/moodle2/backup_zoom_stepslib.php
index 09f6e51c..a4416d1f 100644
--- a/backup/moodle2/backup_zoom_stepslib.php
+++ b/backup/moodle2/backup_zoom_stepslib.php
@@ -15,7 +15,15 @@
 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
 
 /**
- * Define the complete zoom structure for backup, with file and id annotations
+ * Defines backup_zoom_activity_structure_step class.
+ *
+ * @package   mod_zoom
+ * @copyright 2015 UC Regents
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+/**
+ * Define the complete zoom structure for backup, with file and id annotations.
  *
  * @package   mod_zoom
  * @category  backup
diff --git a/classes/task/update_meetings.php b/classes/task/update_meetings.php
index 074cdc48..82a70572 100644
--- a/classes/task/update_meetings.php
+++ b/classes/task/update_meetings.php
@@ -35,12 +35,29 @@
 
 require_once($CFG->dirroot.'/mod/zoom/locallib.php');
 
+/**
+ * Scheduled task to sychronize meeting data.
+ *
+ * @package   mod_zoom
+ * @copyright 2015 UC Regents
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
 class update_meetings extends \core\task\scheduled_task {
 
+    /**
+     * Returns name of task.
+     *
+     * @return string
+     */
     public function get_name() {
         return get_string('updatemeetings', 'mod_zoom');
     }
 
+    /**
+     * Updates meetings that are not expired.
+     *
+     * @return boolean
+     */
     public function execute() {
         global $DB;
 
diff --git a/classes/webservice.php b/classes/webservice.php
index 07fb0e12..0a2d2c19 100644
--- a/classes/webservice.php
+++ b/classes/webservice.php
@@ -313,7 +313,7 @@ protected function parse_zoom_object(&$zoom, $required, &$data) {
      */
     protected function format_meeting_response($zoom) {
         $response = &$this->lastresponse;
-        // "Undoing" the transformations in parse_zoom_object.
+        // Undoing the transformations in parse_zoom_object.
         // Convert duration to seconds.
         $response->duration *= 60;
         // Convert string to timestamp.
diff --git a/mod_form.php b/mod_form.php
index 27930eae..f2d7cc24 100755
--- a/mod_form.php
+++ b/mod_form.php
@@ -119,7 +119,7 @@ public function definition() {
 
         // Add standard grading elements.
         $this->standard_grading_coursemodule_elements();
-        $mform->setDefault('grade',false);
+        $mform->setDefault('grade', false);
 
         // Add standard elements, common to all modules.
         $this->standard_coursemodule_elements();