diff --git a/mod/quiz/accessrules.php b/mod/quiz/accessrules.php
index fc79ddbe539..054fdb9c444 100644
--- a/mod/quiz/accessrules.php
+++ b/mod/quiz/accessrules.php
@@ -490,7 +490,7 @@ abstract class quiz_access_rule_base {
     }
 
     /**
-     * If, becuase of this rule, the user has to finish their attempt by a certain time,
+     * If, because of this rule, the user has to finish their attempt by a certain time,
      * you should override this method to return the amount of time left in seconds.
      * @param object $attempt the current attempt
      * @param int $timenow the time now. We don't use $this->_timenow, so we can
diff --git a/mod/quiz/backup/moodle2/restore_quiz_activity_task.class.php b/mod/quiz/backup/moodle2/restore_quiz_activity_task.class.php
index 6b53c5ec3ae..0bad77d9809 100644
--- a/mod/quiz/backup/moodle2/restore_quiz_activity_task.class.php
+++ b/mod/quiz/backup/moodle2/restore_quiz_activity_task.class.php
@@ -122,7 +122,7 @@ class restore_quiz_activity_task extends restore_activity_task {
         // All the ones calling to review.php have two rules to handle both old and new urls
         // in any case they are always converted to new urls on restore
         // TODO: In Moodle 2.x (x >= 5) kill the old rules
-        // Note we are using the 'quiz_attempt_id' mapping becuase that is the
+        // Note we are using the 'quiz_attempt_id' mapping because that is the
         // one containing the quiz_attempt->ids old an new for quiz-attempt
         $rules[] = new restore_log_rule('quiz', 'attempt',
                 'review.php?id={course_module}&attempt={quiz_attempt}', '{quiz}',
diff --git a/mod/quiz/locallib.php b/mod/quiz/locallib.php
index 8cad96ad9cd..591eb0a77a9 100644
--- a/mod/quiz/locallib.php
+++ b/mod/quiz/locallib.php
@@ -622,7 +622,7 @@ function quiz_update_all_final_grades($quiz) {
 
     switch ($quiz->grademethod) {
         case QUIZ_ATTEMPTFIRST:
-            // Becuase of the where clause, there will only be one row, but we
+            // Because of the where clause, there will only be one row, but we
             // must still use an aggregate function.
             $select = 'MAX(quiza.sumgrades)';
             $join = $firstlastattemptjoin;
@@ -630,7 +630,7 @@ function quiz_update_all_final_grades($quiz) {
             break;
 
         case QUIZ_ATTEMPTLAST:
-            // Becuase of the where clause, there will only be one row, but we
+            // Because of the where clause, there will only be one row, but we
             // must still use an aggregate function.
             $select = 'MAX(quiza.sumgrades)';
             $join = $firstlastattemptjoin;
diff --git a/mod/quiz/mod_form.php b/mod/quiz/mod_form.php
index f05302eed8b..d93efdd2bf0 100644
--- a/mod/quiz/mod_form.php
+++ b/mod/quiz/mod_form.php
@@ -338,7 +338,7 @@ class mod_quiz_mod_form extends moodleform_mod {
                 'boundary_add_fields');
 
         // Add the disabledif rules. We cannot do this using the $repeatoptions parameter to
-        // repeat_elements becuase we don't want to dissable the first feedbacktext.
+        // repeat_elements because we don't want to dissable the first feedbacktext.
         for ($i = 0; $i < $nextel; $i++) {
             $mform->disabledIf('feedbackboundaries[' . $i . ']', 'grade', 'eq', 0);
             $mform->disabledIf('feedbacktext[' . ($i + 1) . ']', 'grade', 'eq', 0);
diff --git a/mod/quiz/settingslib.php b/mod/quiz/settingslib.php
index c0dc19859b6..36247b7d6f3 100644
--- a/mod/quiz/settingslib.php
+++ b/mod/quiz/settingslib.php
@@ -52,7 +52,7 @@ class mod_quiz_admin_review_setting extends admin_setting {
 
     /**
      * This should match {@link mod_quiz_mod_form::$reviewfields} but copied
-     * here becuase generating the admin tree needs to be fast.
+     * here because generating the admin tree needs to be fast.
      * @return array
      */
     public static function fields() {