public function add_new_course_button() {
        global $CFG;
        // Print link to create a new course, for the 1st available category.
        $output = $this->container_start('buttons');
        $url = new moodle_url('/course/edit.php', array('category' => $CFG->defaultrequestcategory, 'returnto' => 'topcat'));
        $output .= $this->single_button($url, get_string('addnewcourse'), 'get');
        $output .= $this->container_end('buttons');
        return $output;
    }