diff --git a/locallib.php b/locallib.php
index 18f9f0e..5d038ec 100644
--- a/locallib.php
+++ b/locallib.php
@@ -117,71 +117,50 @@ class att_manage_page_params {
     /** @var int whether sessions end time will be displayed on manage.php */
     public $showendtime;
 
-    public $studentssort;
-
-    public $studentid;
-
     private $courseid;
 
-    public static function create_default() {
-        $instance = new att_manage_page_params();
-
-        $instance->view = self::DEFAULT_VIEW;
-        $instance->curdate = time();
-        $instance->showendtime = self::DEFAULT_SHOWENDTIME;
-
-        return $instance;
-    }
-
-    public function init(att_manage_page_params $view_params, $courseid) {
+    public function init($courseid) {
         $this->courseid = $courseid;
-
-        $this->init_view($view_params->view);
-
-        $this->init_curdate($view_params->curdate);
-
-        $this->init_show_endtime($view_params->showendtime);
-
-        $this->studentssort = $view_params->studentssort;
-
-        $this->studentid = $view_params->studentid;
-
+        $this->init_view();
+        $this->init_curdate();
+        $this->init_show_endtime();
         $this->init_start_end_date();
     }
 
-    private function init_view($view) {
+    private function init_view() {
         global $SESSION;
 
-        if (isset($view)) {
-            $SESSION->attcurrentattview[$this->courseid] = $view;
-            $this->view = $view;
+        if (isset($this->view)) {
+            $SESSION->attcurrentattview[$this->courseid] = $this->view;
         }
         elseif (isset($SESSION->attcurrentattview[$this->courseid])) {
             $this->view = $SESSION->attcurrentattview[$this->courseid];
         }
+        else {
+            $this->view = self::DEFAULT_VIEW;
+        }
     }
 
-    private function init_curdate($curdate) {
+    private function init_curdate() {
         global $SESSION;
 
-        if ($curdate) {
-            $SESSION->attcurrentattdate[$this->courseid] = $curdate;
-            $this->curdate = $curdate;
+        if (isset($this->curdate)) {
+            $SESSION->attcurrentattdate[$this->courseid] = $this->curdate;
         }
         elseif (isset($SESSION->attcurrentattdate[$this->courseid])) {
             $this->curdate = $SESSION->attcurrentattdate[$this->courseid];
         }
+        else {
+            $this->curdate = time();
+        }
     }
 
-    private function init_show_endtime($show_endtime) {
-        global $SESSION;
-
-        if (isset($show_endtime)) {
-            set_user_preference("attforblock_showendtime", $show_endtime);
-            $this->showendtime = $show_endtime;
+    private function init_show_endtime() {
+        if (isset($this->show_endtime)) {
+            set_user_preference("attforblock_showendtime", $this->show_endtime);
         }
         else {
-            $this->showendtime = get_user_preferences("attforblock_showendtime", $this->showendtime);
+            $this->showendtime = get_user_preferences("attforblock_showendtime", self::DEFAULT_SHOWENDTIME);
         }
     }
 
diff --git a/manage.php b/manage.php
index 31706d2..b8089d6 100644
--- a/manage.php
+++ b/manage.php
@@ -12,13 +12,13 @@
 require_once(dirname(__FILE__).'/../../config.php');
 require_once(dirname(__FILE__).'/locallib.php');
 
-$view_params = new att_manage_page_params();
+$pageparams = new att_manage_page_params();
 
-$id                     = required_param('id', PARAM_INT);
-$from                   = optional_param('from', NULL, PARAM_ACTION);
-$view_params ->view     = optional_param('view', NULL, PARAM_INT);        // which page to show
-$view_params ->curdate  = optional_param('curdate', NULL, PARAM_INT);
-$view_params ->showendtime = optional_param('showendtime', NULL, PARAM_INT);
+$id                         = required_param('id', PARAM_INT);
+$from                       = optional_param('from', NULL, PARAM_ACTION);
+$pageparams ->view          = optional_param('view', NULL, PARAM_INT);
+$pageparams ->curdate       = optional_param('curdate', NULL, PARAM_INT);
+$pageparams ->showendtime   = optional_param('showendtime', NULL, PARAM_INT);
 
 $cm             = get_coursemodule_from_id('attforblock', $id, 0, false, MUST_EXIST);
 $course         = $DB->get_record('course', array('id' => $cm->course), '*', MUST_EXIST);
@@ -26,12 +26,11 @@ $att            = $DB->get_record('attforblock', array('id' => $cm->instance), '
 
 require_login($course, true, $cm);
 
-$att = new attforblock($att, $cm, $course, $PAGE->context, att_manage_page_params::create_default());
+$pageparams->init($course->id);
+$att = new attforblock($att, $cm, $course, $PAGE->context, $pageparams);
 if (!$att->perm->can_manage() && !$att->perm->can_take() && !$att->perm->can_change())
     redirect("view.php?id=$cm->id");
 
-$att->pageparams->init($view_params, $course->id);
-
 // if teacher is coming from block, then check for a session exists for today
 if ($from === 'block') {
     $atts = $att->get_today_sessions();