diff --git a/classes/output/courseformat/content/cm.php b/classes/output/courseformat/content/cm.php
index 5d2f5ab..07e2ee3 100644
--- a/classes/output/courseformat/content/cm.php
+++ b/classes/output/courseformat/content/cm.php
@@ -37,6 +37,12 @@
  */
 class cm extends \core_courseformat\output\local\content\cm {
 
+    /**
+     * Get the name of the template to use for this templatable.
+     *
+     * @param \renderer_base $renderer The renderer requesting the template name
+     * @return string
+     */
     public function get_template_name(\renderer_base $renderer): string {
         return 'format_vsf/local/content/section/cm';
     }
diff --git a/classes/output/courseformat/content/section/cmitem.php b/classes/output/courseformat/content/section/cmitem.php
index 002e902..5ea9f71 100644
--- a/classes/output/courseformat/content/section/cmitem.php
+++ b/classes/output/courseformat/content/section/cmitem.php
@@ -38,6 +38,12 @@
  */
 class cmitem extends \core_courseformat\output\local\content\section\cmitem {
 
+    /**
+     * Get the name of the template to use for this templatable.
+     *
+     * @param \renderer_base $renderer The renderer requesting the template name
+     * @return string
+     */
     public function get_template_name(\renderer_base $renderer): string {
         return 'format_vsf/local/content/section/cmitem';
     }
diff --git a/classes/output/courseformat/content/section/cmlist.php b/classes/output/courseformat/content/section/cmlist.php
index 250bedf..c8541e3 100644
--- a/classes/output/courseformat/content/section/cmlist.php
+++ b/classes/output/courseformat/content/section/cmlist.php
@@ -38,6 +38,12 @@
  */
 class cmlist extends \core_courseformat\output\local\content\section\cmlist {
 
+    /**
+     * Get the name of the template to use for this templatable.
+     *
+     * @param \renderer_base $renderer The renderer requesting the template name
+     * @return string
+     */
     public function get_template_name(\renderer_base $renderer): string {
         return 'format_vsf/local/content/section/cmlist';
     }
diff --git a/classes/output/courseformat/content/sectionselector.php b/classes/output/courseformat/content/sectionselector.php
index 8a672e9..1c1b3c9 100644
--- a/classes/output/courseformat/content/sectionselector.php
+++ b/classes/output/courseformat/content/sectionselector.php
@@ -96,6 +96,11 @@ public function export_for_template(\renderer_base $output): stdClass {
         return $this->data;
     }
 
+    /**
+     * Get the nav data.
+     *
+     * @return stdClass
+     */
     public function get_nav_data() {
         return $this->navdata;
     }
diff --git a/classes/output/renderer.php b/classes/output/renderer.php
index fc3816c..7988477 100644
--- a/classes/output/renderer.php
+++ b/classes/output/renderer.php
@@ -526,6 +526,11 @@ protected function section_activity_summary($section, $course, $mods) {
         }
     }
 
+    /**
+     * Get the navigation link icons.
+     *
+     * @return array
+     */
     public function vsf_get_nav_link_icons() {
         return [
             'next' => 'fa fa-arrow-circle-o-right',
@@ -838,10 +843,20 @@ public function multiple_section_page($course) {
         return $content;
     }
 
+    /**
+     * Get the row class.
+     *
+     * @return string.
+     */
     protected function get_row_class() {
         return 'row';
     }
 
+    /**
+     * Get the column class.
+     *
+     * @return string.
+     */
     protected function get_column_class($columns) {
         if (($columns == 1) || ($this->editing)) {
             return '';