diff --git a/grade/edit/letter/index.php b/grade/edit/letter/index.php
index 025584bc825..3113407abcb 100644
--- a/grade/edit/letter/index.php
+++ b/grade/edit/letter/index.php
@@ -184,21 +184,45 @@ if (!$edit) {
                     // The letter has been assigned to another boundary, we update it.
                     $record->id = $pool[$boundary]->id;
                     $DB->update_record('grade_letters', $record);
+                    // Trigger the letter grade updated event.
+                    $event = \core\event\grade_letter_updated::create(array(
+                        'objectid' => $record->id,
+                        'context' => $context,
+                    ));
+                    $event->trigger();
                 }
                 unset($pool[$boundary]);    // Remove the letter from the pool.
             } else if ($candidate = array_pop($pool)) {
                 // The boundary is new, we update a random record from the pool.
                 $record->id = $candidate->id;
                 $DB->update_record('grade_letters', $record);
+                // Trigger the letter grade updated event.
+                $event = \core\event\grade_letter_updated::create(array(
+                    'objectid' => $record->id,
+                    'context' => $context,
+                ));
+                $event->trigger();
             } else {
                 // No records were found, this must be a new letter.
-                $DB->insert_record('grade_letters', $record);
+                $newid = $DB->insert_record('grade_letters', $record);
+                // Trigger the letter grade added event.
+                $event = \core\event\grade_letter_created::create(array(
+                    'objectid' => $newid,
+                    'context' => $context,
+                ));
+                $event->trigger();
             }
         }
 
         // Delete the unused records.
         foreach($pool as $leftover) {
             $DB->delete_records('grade_letters', array('id' => $leftover->id));
+            // Trigger the letter grade deleted event.
+            $event = \core\event\grade_letter_deleted::create(array(
+                'objectid' => $leftover->id,
+                'context' => $context,
+            ));
+            $event->trigger();
         }
 
         redirect($returnurl);
diff --git a/grade/tests/behat/grade_letter_logging.feature b/grade/tests/behat/grade_letter_logging.feature
new file mode 100644
index 00000000000..db472f05de5
--- /dev/null
+++ b/grade/tests/behat/grade_letter_logging.feature
@@ -0,0 +1,37 @@
+@core @core_grades
+Feature: We can view the logs for any changes to grade letters.
+  In order to view changes the letter boundary of a course
+  As an administrator
+  I need to add make changes and then view the logs.
+
+  Scenario: I override the letter boundaries and check the logs.
+    Given the following "courses" exist:
+      | fullname | shortname | category |
+      | Course 1 | C1 | 0 |
+    And I log in as "admin"
+    And I am on "Course 1" course homepage
+    And I navigate to "Setup > Course grade settings" in the course gradebook
+    And I set the following fields to these values:
+      | Grade display type | Letter |
+    And I press "Save changes"
+    And I navigate to "Letters" in the course gradebook
+    And I follow "Edit grade letters"
+    And I set the following fields to these values:
+      | id_override | 1 |
+      | id_gradeboundary10 | 57 |
+    And I press "Save changes"
+    And I follow "Edit grade letters"
+    And I set the following fields to these values:
+      | id_override | 1 |
+      | id_gradeboundary10 | 50 |
+    And I press "Save changes"
+    And I follow "Edit grade letters"
+    And I set the following fields to these values:
+      | id_override | 1 |
+      | id_gradeletter11 | |
+      | id_gradeboundary11 | |
+    And I press "Save changes"
+    When I navigate to "Live logs" node in "Site administration > Reports"
+    Then I should see "Grade letter created"
+    And I should see "Grade letter updated"
+    And I should see "Grade letter deleted"
diff --git a/grade/tests/behat/grade_scales_logging.feature b/grade/tests/behat/grade_scales_logging.feature
new file mode 100644
index 00000000000..0af66d2c213
--- /dev/null
+++ b/grade/tests/behat/grade_scales_logging.feature
@@ -0,0 +1,27 @@
+@core @core_grades
+Feature: We can view the logs for any changes to grade scales.
+  In order to view changes grade scales
+  As an administrator
+  I need to add make changes and then view the logs.
+
+  Scenario: I edit scales and then view the logs.
+    Given I log in as "admin"
+    And I navigate to "Scales" node in "Site administration > Grades"
+    # Add a scale
+    And I press "Add a new scale"
+    And I set the following fields to these values:
+      | Name  | Letterscale |
+      | Scale | F,D,C,B,A   |
+    And I press "Save changes"
+    # Delete first scale
+    And I follow "Delete"
+    And I press "Continue"
+    # Edit first scale
+    And I follow "Edit"
+    And I set the following fields to these values:
+      | id_scale | ONE,TWO,THREE |
+    And I press "Save changes"
+    When I navigate to "Live logs" node in "Site administration > Reports"
+    Then I should see "Scale created"
+    And I should see "Scale updated"
+    And I should see "Scale deleted"
diff --git a/grade/tests/events_test.php b/grade/tests/events_test.php
new file mode 100644
index 00000000000..5789fcd3f48
--- /dev/null
+++ b/grade/tests/events_test.php
@@ -0,0 +1,204 @@
+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+/**
+ * Unit tests for events found in /grade/letter and /grade/scale.
+ *
+ * @package   core_grades
+ * @category  test
+ * @copyright 2017 Stephen Bourget
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU Public License
+ */
+
+defined('MOODLE_INTERNAL') || die();
+
+global $CFG;
+require_once($CFG->dirroot . '/grade/lib.php');
+
+/**
+ * Unit tests for grade events.
+ *
+ * @package   core_grades
+ * @category  test
+ * @copyright 2017 Stephen Bourget
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class core_grade_events_test extends advanced_testcase {
+
+    /** @var stdClass the course used for testing */
+    private $course;
+
+    /**
+     * Test set up.
+     *
+     * This is executed before running any test in this file.
+     */
+    public function setUp() {
+        $this->resetAfterTest();
+
+        $this->setAdminUser();
+        $this->course = $this->getDataGenerator()->create_course();
+    }
+
+    /**
+     * Test the grade letter created event.
+     *
+     * There is no external API for triggering this event, so the unit test will simply
+     * create and trigger the event and ensure the data is returned as expected.
+     */
+    public function test_grade_letter_created() {
+        // Create a grade letter created event.
+        $event = \core\event\grade_letter_created::create(array(
+            'objectid' => 10,
+            'context' => context_course::instance($this->course->id)
+        ));
+
+        // Trigger and capture the event.
+        $sink = $this->redirectEvents();
+        $event->trigger();
+        $events = $sink->get_events();
+        $event = reset($events);
+
+        // Check that the event data is valid.
+        $this->assertInstanceOf('\core\event\grade_letter_created', $event);
+        $this->assertEquals(context_course::instance($this->course->id), $event->get_context());
+    }
+
+    /**
+     * Test the grade letter deleted event.
+     *
+     * There is no external API for triggering this event, so the unit test will simply
+     * create and trigger the event and ensure the data is returned as expected.
+     */
+    public function test_grade_letter_deleted() {
+        // Create a grade letter deleted event.
+        $event = \core\event\grade_letter_deleted::create(array(
+            'objectid' => 10,
+            'context' => context_course::instance($this->course->id)
+        ));
+
+        // Trigger and capture the event.
+        $sink = $this->redirectEvents();
+        $event->trigger();
+        $events = $sink->get_events();
+        $event = reset($events);
+
+        // Check that the event data is valid.
+        $this->assertInstanceOf('\core\event\grade_letter_deleted', $event);
+        $this->assertEquals(context_course::instance($this->course->id), $event->get_context());
+    }
+
+    /**
+     * Test the grade letter updated event.
+     *
+     * There is no external API for triggering this event, so the unit test will simply
+     * create and trigger the event and ensure the data is returned as expected.
+     */
+    public function test_grade_letter_updated() {
+        // Create a grade letter updated event.
+        $event = \core\event\grade_letter_updated::create(array(
+            'objectid' => 10,
+            'context' => context_course::instance($this->course->id)
+        ));
+
+        // Trigger and capture the event.
+        $sink = $this->redirectEvents();
+        $event->trigger();
+        $events = $sink->get_events();
+        $event = reset($events);
+
+        // Check that the event data is valid.
+        $this->assertInstanceOf('\core\event\grade_letter_updated', $event);
+        $this->assertEquals(context_course::instance($this->course->id), $event->get_context());
+    }
+
+    /**
+     * Test the scale created event.
+     */
+    public function test_scale_created() {
+        $gradescale = new grade_scale();
+        $gradescale->name        = 'unittestscale3';
+        $gradescale->courseid    = $this->course->id;
+        $gradescale->userid      = 317;
+        $gradescale->scale       = 'Distinction, Very Good, Good, Pass, Fail';
+        $gradescale->description = 'This scale is used to mark standard assignments.';
+
+        $url = new \moodle_url('/grade/edit/scale/index.php', array('id' => $this->course->id));
+
+        // Trigger and capture the event.
+        $sink = $this->redirectEvents();
+        $id = $gradescale->insert();
+        $events = $sink->get_events();
+        $event = reset($events);
+
+        // Check that the event data is valid.
+        $this->assertInstanceOf('\core\event\scale_created', $event);
+        $this->assertEquals($id, $event->objectid);
+        $this->assertEquals($url, $event->get_url());
+        $this->assertEquals(context_course::instance($this->course->id), $event->get_context());
+    }
+
+    /**
+     * Test the scale deleted event.
+     */
+    public function test_scale_deleted() {
+        $gradescale = new grade_scale();
+        $gradescale->name        = 'unittestscale3';
+        $gradescale->courseid    = $this->course->id;
+        $gradescale->userid      = 317;
+        $gradescale->scale       = 'Distinction, Very Good, Good, Pass, Fail';
+        $gradescale->description = 'This scale is used to mark standard assignments.';
+        $gradescale->insert();
+
+        // Trigger and capture the event.
+        $sink = $this->redirectEvents();
+        $gradescale->delete();
+        $events = $sink->get_events();
+        $event = reset($events);
+
+        // Check that the event data is valid.
+        $this->assertInstanceOf('\core\event\scale_deleted', $event);
+        $this->assertEquals(context_course::instance($this->course->id), $event->get_context());
+    }
+
+    /**
+     * Test the scale updated event.
+     */
+    public function test_scale_updated() {
+        $gradescale = new grade_scale();
+        $gradescale->name        = 'unittestscale3';
+        $gradescale->courseid    = $this->course->id;
+        $gradescale->userid      = 317;
+        $gradescale->scale       = 'Distinction, Very Good, Good, Pass, Fail';
+        $gradescale->description = 'This scale is used to mark standard assignments.';
+        $id = $gradescale->insert();
+
+        $gradescale->name = 'Updated info for this unittest grade_scale';
+        $url = new \moodle_url('/grade/edit/scale/index.php', array('id' => $this->course->id));
+
+        // Trigger and capture the event.
+        $sink = $this->redirectEvents();
+        $gradescale->update();
+        $events = $sink->get_events();
+        $event = reset($events);
+
+        // Check that the event data is valid.
+        $this->assertInstanceOf('\core\event\scale_updated', $event);
+        $this->assertEquals($id, $event->objectid);
+        $this->assertEquals($url, $event->get_url());
+        $this->assertEquals(context_course::instance($this->course->id), $event->get_context());
+    }
+}
diff --git a/lang/en/grades.php b/lang/en/grades.php
index b166512456c..7037a00dc81 100644
--- a/lang/en/grades.php
+++ b/lang/en/grades.php
@@ -194,7 +194,13 @@ $string['errorupdatinggradecategoryaggregateoutcomes'] = 'Error updating the "In
 $string['errorupdatinggradecategoryaggregation'] = 'Error updating the aggregation type of grade category ID {$a->id}';
 $string['errorupdatinggradeitemaggregationcoef'] = 'Error updating the aggregation coefficient (weight or extra credit) of grade item ID {$a->id}';
 $string['eventgradedeleted'] = 'Grade deleted';
+$string['eventgradelettercreated'] = 'Grade letter created';
+$string['eventgradeletterdeleted'] = 'Grade letter deleted';
+$string['eventgradeletterupdated'] = 'Grade letter updated';
 $string['eventgradeviewed'] = 'Grades were viewed in the gradebook';
+$string['eventscalecreated'] = 'Scale created';
+$string['eventscaledeleted'] = 'Scale deleted';
+$string['eventscaleupdated'] = 'Scale updated';
 $string['eventusergraded'] = 'User graded';
 $string['excluded'] = 'Excluded';
 $string['excluded_help'] = 'If ticked, the grade will not be included in any aggregation.';
diff --git a/lib/classes/event/grade_letter_created.php b/lib/classes/event/grade_letter_created.php
new file mode 100644
index 00000000000..f91399094fe
--- /dev/null
+++ b/lib/classes/event/grade_letter_created.php
@@ -0,0 +1,93 @@
+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+/**
+ * Grade letter created event.
+ *
+ * @package    core
+ * @copyright  2017 Stephen Bourget
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace core\event;
+
+defined('MOODLE_INTERNAL') || die();
+
+/**
+ * Grade letter created event class.
+ *
+ * @package    core
+ * @since      Moodle 3.5
+ * @copyright  2017 Stephen Bourget
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class grade_letter_created extends base {
+
+    /**
+     * Init method.
+     *
+     * @return void
+     */
+    protected function init() {
+        $this->data['objecttable'] = 'grade_letters';
+        $this->data['crud'] = 'c';
+        $this->data['edulevel'] = self::LEVEL_OTHER;
+    }
+
+    /**
+     * Return localised event name.
+     *
+     * @return string
+     */
+    public static function get_name() {
+        return get_string('eventgradelettercreated', 'core_grades');
+    }
+
+    /**
+     * Returns description of what happened.
+     *
+     * @return string
+     */
+    public function get_description() {
+        if ($this->courseid) {
+            return "The user with id '$this->userid' created the letter grade with id '$this->objectid'".
+                    " in the course in the id '".$this->courseid."'.";
+        } else {
+            return "The user with id '$this->userid' created the letter grade with id '$this->objectid'.";
+        }
+    }
+
+    /**
+     * Returns relevant URL.
+     * @return \moodle_url
+     */
+    public function get_url() {
+        $url = new \moodle_url('/grade/edit/letter/index.php');
+        if ($this->courseid) {
+            $url->param('id', $this->contextid);
+        }
+        return $url;
+    }
+
+    /**
+     * Used for mapping events on restore
+     * @return array
+     */
+    public static function get_objectid_mapping() {
+        return array('db' => 'grade_letters', 'restore' => 'grade_letters');
+    }
+
+}
diff --git a/lib/classes/event/grade_letter_deleted.php b/lib/classes/event/grade_letter_deleted.php
new file mode 100644
index 00000000000..e5dca9c0ddf
--- /dev/null
+++ b/lib/classes/event/grade_letter_deleted.php
@@ -0,0 +1,82 @@
+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+/**
+ * Grade letter deleted event.
+ *
+ * @package    core
+ * @copyright  2017 Stephen Bourget
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace core\event;
+
+defined('MOODLE_INTERNAL') || die();
+
+/**
+ * Grade letter deleted event class.
+ *
+ * @package    core
+ * @since      Moodle 3.5
+ * @copyright  2017 Stephen Bourget
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class grade_letter_deleted extends base {
+
+    /**
+     * Init method.
+     *
+     * @return void
+     */
+    protected function init() {
+        $this->data['objecttable'] = 'grade_letters';
+        $this->data['crud'] = 'd';
+        $this->data['edulevel'] = self::LEVEL_OTHER;
+    }
+
+    /**
+     * Return localised event name.
+     *
+     * @return string
+     */
+    public static function get_name() {
+        return get_string('eventgradeletterdeleted', 'core_grades');
+    }
+
+    /**
+     * Returns description of what happened.
+     *
+     * @return string
+     */
+    public function get_description() {
+        if ($this->courseid) {
+            return "The user with id '$this->userid' deleted the letter grade with id '$this->objectid'".
+                    " from the course in the id '".$this->courseid."'.";
+        }
+
+        return "The user with id '$this->userid' deleted the letter grade with id '$this->objectid'.";
+    }
+
+    /**
+     * Used for mapping events on restore
+     *
+     * @return array
+     */
+    public static function get_objectid_mapping() {
+        return array('db' => 'grade_letters', 'restore' => 'grade_letters');
+    }
+
+}
diff --git a/lib/classes/event/grade_letter_updated.php b/lib/classes/event/grade_letter_updated.php
new file mode 100644
index 00000000000..b3ecaf12b04
--- /dev/null
+++ b/lib/classes/event/grade_letter_updated.php
@@ -0,0 +1,95 @@
+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+/**
+ * Grade letter updated event.
+ *
+ * @package    core
+ * @copyright  2017 Stephen Bourget
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace core\event;
+
+defined('MOODLE_INTERNAL') || die();
+
+/**
+ * Grade letter updated event class.
+ *
+ * @package    core
+ * @since      Moodle 3.5
+ * @copyright  2017 Stephen Bourget
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class grade_letter_updated extends base {
+
+    /**
+     * Init method.
+     *
+     * @return void
+     */
+    protected function init() {
+        $this->data['objecttable'] = 'grade_letters';
+        $this->data['crud'] = 'u';
+        $this->data['edulevel'] = self::LEVEL_OTHER;
+    }
+
+    /**
+     * Return localised event name.
+     *
+     * @return string
+     */
+    public static function get_name() {
+        return get_string('eventgradeletterupdated', 'core_grades');
+    }
+
+    /**
+     * Returns description of what happened.
+     *
+     * @return string
+     */
+    public function get_description() {
+        if ($this->courseid) {
+            return "The user with id '$this->userid' updated the letter grade with id '$this->objectid'".
+                    " in the course in the id '".$this->courseid."'.";
+        } else {
+            return "The user with id '$this->userid' updated the letter grade with id '$this->objectid'.";
+        }
+    }
+
+    /**
+     * Returns relevant URL.
+     *
+     * @return \moodle_url
+     */
+    public function get_url() {
+        $url = new \moodle_url('/grade/edit/letter/index.php');
+        if ($this->courseid) {
+            $url->param('id', $this->contextid);
+        }
+        return $url;
+    }
+
+    /**
+     * Used for mapping events on restore
+     *
+     * @return array
+     */
+    public static function get_objectid_mapping() {
+        return array('db' => 'grade_letters', 'restore' => 'grade_letters');
+    }
+
+}
diff --git a/lib/classes/event/scale_created.php b/lib/classes/event/scale_created.php
new file mode 100644
index 00000000000..b1b8750e7a5
--- /dev/null
+++ b/lib/classes/event/scale_created.php
@@ -0,0 +1,95 @@
+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+/**
+ * Scale created event.
+ *
+ * @package    core
+ * @copyright  2017 Stephen Bourget
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace core\event;
+
+defined('MOODLE_INTERNAL') || die();
+
+/**
+ * Scale created event class.
+ *
+ * @package    core
+ * @since      Moodle 3.5
+ * @copyright  2017 Stephen Bourget
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class scale_created extends base {
+
+    /**
+     * Init method.
+     *
+     * @return void
+     */
+    protected function init() {
+        $this->data['objecttable'] = 'scale';
+        $this->data['crud'] = 'c';
+        $this->data['edulevel'] = self::LEVEL_OTHER;
+    }
+
+    /**
+     * Return localised event name.
+     *
+     * @return string
+     */
+    public static function get_name() {
+        return get_string('eventscalecreated', 'core_grades');
+    }
+
+    /**
+     * Returns description of what happened.
+     *
+     * @return string
+     */
+    public function get_description() {
+        if ($this->courseid) {
+            return "The user with id '$this->userid' created the custom scale with id '$this->objectid'".
+                    " from the course in the id '".$this->courseid."'.";
+        }
+
+        return "The user with id '$this->userid' created the standard scale with id '$this->objectid'.";
+    }
+
+    /**
+     * Returns relevant URL.
+     *
+     * @return \moodle_url
+     */
+    public function get_url() {
+        $url = new \moodle_url('/grade/edit/scale/index.php');
+        if ($this->courseid) {
+            $url->param('id', $this->courseid);
+        }
+        return $url;
+    }
+
+    /**
+     * Used for mapping events on restore
+     *
+     * @return array
+     */
+    public static function get_objectid_mapping() {
+        return array('db' => 'scale', 'restore' => 'scale');
+    }
+
+}
diff --git a/lib/classes/event/scale_deleted.php b/lib/classes/event/scale_deleted.php
new file mode 100644
index 00000000000..8ab883c1a44
--- /dev/null
+++ b/lib/classes/event/scale_deleted.php
@@ -0,0 +1,82 @@
+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+/**
+ * Scale deleted event.
+ *
+ * @package    core
+ * @copyright  2017 Stephen Bourget
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace core\event;
+
+defined('MOODLE_INTERNAL') || die();
+
+/**
+ * Scale deleted event class.
+ *
+ * @package    core
+ * @since      Moodle 3.5
+ * @copyright  2017 Stephen Bourget
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class scale_deleted extends base {
+
+    /**
+     * Init method.
+     *
+     * @return void
+     */
+    protected function init() {
+        $this->data['objecttable'] = 'scale';
+        $this->data['crud'] = 'd';
+        $this->data['edulevel'] = self::LEVEL_OTHER;
+    }
+
+    /**
+     * Return localised event name.
+     *
+     * @return string
+     */
+    public static function get_name() {
+        return get_string('eventscaledeleted', 'core_grades');
+    }
+
+    /**
+     * Returns description of what happened.
+     *
+     * @return string
+     */
+    public function get_description() {
+        if ($this->courseid) {
+            return "The user with id '$this->userid' deleted the custom scale with id '$this->objectid'".
+                    " from the course with the id '".$this->courseid."'.";
+        }
+
+        return "The user with id '$this->userid' deleted the standard scale with id '$this->objectid'.";
+    }
+
+    /**
+     * Used for mapping events on restore
+     *
+     * @return array
+     */
+    public static function get_objectid_mapping() {
+        return array('db' => 'scale', 'restore' => 'scale');
+    }
+
+}
diff --git a/lib/classes/event/scale_updated.php b/lib/classes/event/scale_updated.php
new file mode 100644
index 00000000000..f99e0d3cbeb
--- /dev/null
+++ b/lib/classes/event/scale_updated.php
@@ -0,0 +1,95 @@
+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+/**
+ * Scale updated event.
+ *
+ * @package    core
+ * @copyright  2017 Stephen Bourget
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace core\event;
+
+defined('MOODLE_INTERNAL') || die();
+
+/**
+ * Scale updated event class.
+ *
+ * @package    core
+ * @since      Moodle 3.5
+ * @copyright  2017 Stephen Bourget
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class scale_updated extends base {
+
+    /**
+     * Init method.
+     *
+     * @return void
+     */
+    protected function init() {
+        $this->data['objecttable'] = 'scale';
+        $this->data['crud'] = 'u';
+        $this->data['edulevel'] = self::LEVEL_OTHER;
+    }
+
+    /**
+     * Return localised event name.
+     *
+     * @return string
+     */
+    public static function get_name() {
+        return get_string('eventscaleupdated', 'core_grades');
+    }
+
+    /**
+     * Returns description of what happened.
+     *
+     * @return string
+     */
+    public function get_description() {
+        if ($this->courseid) {
+            return "The user with id '$this->userid' updated the custom scale with id '$this->objectid'".
+                    " from the course in the id '".$this->courseid."'.";
+        }
+
+        return "The user with id '$this->userid' updated the standard scale with id '$this->objectid'.";
+    }
+
+    /**
+     * Returns relevant URL.
+     *
+     * @return \moodle_url
+     */
+    public function get_url() {
+        $url = new \moodle_url('/grade/edit/scale/index.php');
+        if ($this->courseid) {
+            $url->param('id', $this->courseid);
+        }
+        return $url;
+    }
+
+    /**
+     * Used for mapping events on restore
+     *
+     * @return array
+     */
+    public static function get_objectid_mapping() {
+        return array('db' => 'scale', 'restore' => 'scale');
+    }
+
+}
diff --git a/lib/grade/grade_scale.php b/lib/grade/grade_scale.php
index 450fa67e0e4..96850088082 100644
--- a/lib/grade/grade_scale.php
+++ b/lib/grade/grade_scale.php
@@ -119,7 +119,26 @@ class grade_scale extends grade_object {
     public function insert($source=null) {
         $this->timecreated = time();
         $this->timemodified = time();
-        return parent::insert($source);
+
+        $result = parent::insert($source);
+        if ($result) {
+            // Trigger the scale created event.
+            if (!empty($this->standard)) {
+                $eventcontext = context_system::instance();
+            } else {
+                if ((!empty($this->courseid)) && ($this->courseid != SITEID)) {
+                    $eventcontext = context_course::instance($this->courseid);
+                } else {
+                    $eventcontext = context_system::instance();
+                }
+            }
+            $event = \core\event\scale_created::create(array(
+                'objectid' => $result,
+                'context' => $eventcontext
+            ));
+            $event->trigger();
+        }
+        return $result;
     }
 
     /**
@@ -130,17 +149,52 @@ class grade_scale extends grade_object {
      */
     public function update($source=null) {
         $this->timemodified = time();
-        return parent::update($source);
+
+        $result = parent::update($source);
+        if ($result) {
+            // Trigger the scale updated event.
+            if (!empty($this->standard)) {
+                $eventcontext = context_system::instance();
+            } else {
+                if ((!empty($this->courseid)) && ($this->courseid != SITEID)) {
+                    $eventcontext = context_course::instance($this->courseid);
+                } else {
+                    $eventcontext = context_system::instance();
+                }
+            }
+            $event = \core\event\scale_updated::create(array(
+                'objectid' => $this->id,
+                'context' => $eventcontext
+            ));
+            $event->trigger();
+        }
+        return $result;
     }
 
     /**
-     * Deletes this outcome from the database.
+     * Deletes this scale from the database.
      *
      * @param string $source from where was the object deleted (mod/forum, manual, etc.)
      * @return bool success
      */
     public function delete($source=null) {
         global $DB;
+
+        // Trigger the scale deleted event.
+        if (!empty($this->standard)) {
+            $eventcontext = context_system::instance();
+        } else {
+            if ((!empty($this->courseid)) && ($this->courseid != SITEID)) {
+                $eventcontext = context_course::instance($this->courseid);
+            } else {
+                $eventcontext = context_system::instance();
+            }
+        }
+        $event = \core\event\scale_deleted::create(array(
+            'objectid' => $this->id,
+            'context' => $eventcontext
+        ));
+        $event->trigger();
         if (parent::delete($source)) {
             $context = context_system::instance();
             $fs = get_file_storage();