diff --git a/main/gradebook/index.php b/main/gradebook/index.php
index cabc0c8713..92f4cf8aa9 100644
--- a/main/gradebook/index.php
+++ b/main/gradebook/index.php
@@ -815,7 +815,7 @@ if (isset($first_time) && $first_time==1 && api_is_allowed_to_edit(null,true)) {
     
 	if (!empty($cats)) {
         
-        if (api_is_allowed_to_edit(null, true)) {
+        if (api_is_allowed_to_edit(null, true) && api_get_setting('teachers_can_change_grade_model_settings') == 'true') {
             //Getting grade models
             $obj = new GradeModel();
             $grade_models = $obj->get_all();                
diff --git a/main/gradebook/lib/fe/catform.class.php b/main/gradebook/lib/fe/catform.class.php
index 54535fee14..70d16dcae2 100644
--- a/main/gradebook/lib/fe/catform.class.php
+++ b/main/gradebook/lib/fe/catform.class.php
@@ -193,7 +193,7 @@ class CatForm extends FormValidator {
    		$this->addElement('hidden','hid_parent_id');
 		$this->addElement('textarea', 'description', get_lang('Description'),array('class'=>'span3','cols' => '34'));        
         
-        if (isset($this->category_object) && $this->category_object->get_parent_id() == 0) {
+        if (isset($this->category_object) && $this->category_object->get_parent_id() == 0 && api_get_setting('teachers_can_change_grade_model_settings') == 'true') {
             //Getting grade models
             $obj = new GradeModel();
             $grade_models = $obj->get_all();                
diff --git a/main/install/db_main.sql b/main/install/db_main.sql
index 88cdc10050..43a5c3e808 100644
--- a/main/install/db_main.sql
+++ b/main/install/db_main.sql
@@ -852,7 +852,9 @@ VALUES
 ('allow_browser_sniffer', NULL, 'radio', 'Tuning', 'false', 'AllowBrowserSnifferTitle', 'AllowBrowserSnifferComment', NULL, NULL, 0),
 ('enable_wami_record',NULL,'radio','Tools','false','EnableWamiRecordTitle','EnableWamiRecordComment',NULL,NULL, 0),
 ('gradebook_default_weight', NULL, 'textfield', 'Gradebook', '100', 'GradebookDefaultWeightTitle', 'GradebookDefaultWeightComment', NULL, NULL, 0),
-('chamilo_database_version',NULL,'textfield',NULL, '1.9.0.17752','DatabaseVersion','', NULL, NULL, 0);
+('teachers_can_change_score_settings', NULL, 'radio', 'Gradebook', 'true', 'TeachersCanChangeScoreSettingsTitle', 'TeachersCanChangeScoreSettingsComment', NULL, NULL, 1),
+('teachers_can_change_grade_model_settings', NULL, 'radio', 'Gradebook', 'true', 'TeachersCanChangeGradeModelSettingsTitle', 'TeachersCanChangeGradeModelSettingsComment', NULL, NULL, 1),
+('chamilo_database_version',NULL,'textfield',NULL, '1.9.0.17759','DatabaseVersion','', NULL, NULL, 0);
 
 /*
 ('show_tabs', 'custom_tab_1', 'checkbox', 'Platform', 'true', 'ShowTabsTitle', 'ShowTabsComment', NULL, 'TabsCustom1', 1),
@@ -1188,7 +1190,9 @@ VALUES
 ('enable_wami_record', 'true', 'Yes'),
 ('enable_wami_record', 'false', 'No'),
 ('teachers_can_change_score_settings', 'true', 'Yes'),
-('teachers_can_change_score_settings', 'false', 'No');
+('teachers_can_change_score_settings', 'false', 'No'),
+('teachers_can_change_grade_model_settings', 'true', 'Yes'),
+('teachers_can_change_grade_model_settings', 'false', 'No');
 UNLOCK TABLES;
 /*
 ('activate_send_event_by_mail', 'true', 'Yes'),
diff --git a/main/install/migrate-db-1.8.8-1.9.0-pre.sql b/main/install/migrate-db-1.8.8-1.9.0-pre.sql
index acad86c891..1d89882058 100755
--- a/main/install/migrate-db-1.8.8-1.9.0-pre.sql
+++ b/main/install/migrate-db-1.8.8-1.9.0-pre.sql
@@ -96,6 +96,10 @@ INSERT INTO settings_current (variable, subkey, type, category, selected_value,
 INSERT INTO settings_options (variable, value, display_text) VALUES ('teachers_can_change_score_settings', 'true', 'Yes');
 INSERT INTO settings_options (variable, value, display_text) VALUES ('teachers_can_change_score_settings', 'false', 'No');
 
+INSERT INTO settings_current (variable, subkey, type, category, selected_value, title, comment, scope, subkeytext, access_url_changeable) VALUES ('teachers_can_change_grade_model_settings', NULL, 'radio', 'Gradebook', 'true', 'TeachersCanChangeGradeModelSettingsTitle', 'TeachersCanChangeGradeModelSettingsComment', NULL, NULL, 1);
+INSERT INTO settings_options (variable, value, display_text) VALUES ('teachers_can_change_grade_model_settings', 'true', 'Yes');
+INSERT INTO settings_options (variable, value, display_text) VALUES ('teachers_can_change_grade_model_settings', 'false', 'No');
+
 INSERT INTO settings_current (variable, subkey, type, category, selected_value, title, comment, scope, subkeytext, access_url_changeable) VALUES ('allow_users_to_change_email_with_no_password', NULL, 'radio', 'User', 'false', 'AllowUsersToChangeEmailWithNoPasswordTitle', 'AllowUsersToChangeEmailWithNoPasswordComment', NULL, NULL, 0);
 INSERT INTO settings_options (variable, value, display_text) VALUES ('allow_users_to_change_email_with_no_password', 'true', 'Yes');
 INSERT INTO settings_options (variable, value, display_text) VALUES ('allow_users_to_change_email_with_no_password', 'false', 'No');
@@ -184,7 +188,7 @@ DELETE FROM settings_current WHERE variable = 'use_document_title';
 DELETE FROM settings_options WHERE variable = 'use_document_title';
 
 -- Do not move this query
-UPDATE settings_current SET selected_value = '1.9.0.17752' WHERE variable = 'chamilo_database_version';
+UPDATE settings_current SET selected_value = '1.9.0.17759' WHERE variable = 'chamilo_database_version';
 
 -- xxSTATSxx
 ALTER TABLE track_e_exercices ADD COLUMN questions_to_check TEXT NOT NULL DEFAULT '';