diff --git a/locallib.php b/locallib.php
index cba6927..ff8bc1e 100644
--- a/locallib.php
+++ b/locallib.php
@@ -115,7 +115,7 @@ function attendance_get_setname($attid, $statusset, $includevalues = true) {
  * @param stdClass $pageparams
  * @return array
  */
-function get_user_sessions_log_full($userid, $pageparams) {
+function attendance_get_user_sessions_log_full($userid, $pageparams) {
     global $DB;
     // All taken sessions (including previous groups).
 
@@ -364,6 +364,54 @@ function attendance_update_users_grade($attendance, $userids=array()) {
     return grade_update('mod/attendance', $course->id, 'mod', 'attendance', $attendance->id, 0, $grades);
 }
 
+/**
+ * Update grades for specified users for specified attendance
+ *
+ * @param integer $attendanceid - the id of the attendance to update
+ * @param integer $grade - the value of the 'grade' property of the specified attendance
+ * @param array $userids - the userids of the users to be updated
+ */
+function attendance_update_users_grades_by_id($attendanceid, $grade, $userids) {
+    global $DB;
+
+    if (empty($grade)) {
+        return false;
+    }
+
+    list($course, $cm) = get_course_and_cm_from_instance($attendanceid, 'attendance');
+
+    $summary = new mod_attendance_summary($attendanceid, $userids);
+
+    if (empty($userids)) {
+        $context = context_module::instance($cm->id);
+        $userids = array_keys(get_enrolled_users($context, 'mod/attendance:canbelisted', 0, 'u.id'));
+    }
+
+    if ($grade < 0) {
+        $dbparams = array('id' => -($grade));
+        $scale = $DB->get_record('scale', $dbparams);
+        $scalearray = explode(',', $scale->scale);
+        $attendancegrade = count($scalearray);
+    } else {
+        $attendancegrade = $grade;
+    }
+
+    $grades = array();
+    foreach ($userids as $userid) {
+        $grades[$userid] = new stdClass();
+        $grades[$userid]->userid = $userid;
+
+        if ($summary->has_taken_sessions($userid)) {
+            $usersummary = $summary->get_taken_sessions_summary_for($userid);
+            $grades[$userid]->rawgrade = $usersummary->takensessionspercentage * $attendancegrade;
+        } else {
+            $grades[$userid]->rawgrade = null;
+        }
+    }
+
+    return grade_update('mod/attendance', $course->id, 'mod', 'attendance', $attendanceid, 0, $grades);
+}
+
 /**
  * Add an attendance status variable
  *
diff --git a/renderables.php b/renderables.php
index 1271006..90ce3ce 100644
--- a/renderables.php
+++ b/renderables.php
@@ -516,7 +516,7 @@ class attendance_user_data implements renderable {
                 $this->filtercontrols = new attendance_filter_controls($att);
             }
 
-            $this->sessionslog = get_user_sessions_log_full($userid, $this->pageparams);
+            $this->sessionslog = attendance_get_user_sessions_log_full($userid, $this->pageparams);
 
             foreach ($this->sessionslog as $sessid => $sess) {
                 $this->sessionslog[$sessid]->cmid = $this->coursesatts[$sess->attendanceid]->cmid;
@@ -546,12 +546,145 @@ class attendance_user_data implements renderable {
     }
 
     /**
-     * url helper.
+     * Url function
+     * @param array $params
+     * @param array $excludeparams
      * @return moodle_url
      */
-    public function url() {
-        return new moodle_url($this->urlpath, $this->urlparams);
+    public function url($params=array(), $excludeparams=array()) {
+        $params = array_merge($this->urlparams, $params);
+
+        foreach ($excludeparams as $paramkey) {
+            unset($params[$paramkey]);
+        }
+
+        return new moodle_url($this->urlpath, $params);
+    }
+
+    /**
+     * Take multiple sessions attendance from form data.
+     *
+     * @param stdClass $formdata
+     */
+    public function take_sessions_from_form_data($formdata) {
+        global $DB, $USER;
+        // TODO: WARNING - $formdata is unclean - comes from direct $_POST - ideally needs a rewrite but we do some cleaning below.
+        // This whole function could do with a nice clean up.
+
+        // XXX - replace this, see below
+        //$statuses = implode(',', array_keys( (array)$this->get_statuses() ));
+        $now = time();
+        $sesslog = array();
+        $formdata = (array)$formdata;
+        $dbstudlogs = array();
+        $updatedsessions = array();
+        $sessionatt = array();
+
+        foreach ($formdata as $key => $value) {
+            // Look at Remarks field because the user options may not be passed if empty.
+            if (substr($key, 0, 7) == 'remarks') {
+                $formlog = array();
+                $parts = explode('sess', substr($key, 7));
+                $stid = $parts[0];
+                if (!(is_numeric($stid))) { // Sanity check on $stid.
+                    print_error('nonnumericid', 'attendance');
+                }
+                $sessid = $parts[1];
+                if (!(is_numeric($sessid))) { // Sanity check on $sessid.
+                    print_error('nonnumericid', 'attendance');
+                }
+                $dbsession = $this->sessionslog[$sessid];
+
+                $context = context_module::instance($dbsession->cmid);
+                if (!has_capability('mod/attendance:takeattendances', $context)) {
+                    // How do we tell user about this?
+                    error_log("User without capability tried to take attendance for context, cmid:", $dbsession->cmid);
+                    continue;
+                }
+
+                $formkey = 'user'.$stid.'sess'.$sessid;
+                $attid = $dbsession->attendanceid;
+                $statusset = array_filter($this->statuses[$attid], function($x) use($dbsession) { return $x->setnumber === $dbsession->statusset; });
+                $sessionatt[$sessid] = $attid;
+                $formlog = new stdClass();
+                if (array_key_exists($formkey, $formdata) && is_numeric($formdata[$formkey])) {
+                    $formlog->statusid = $formdata[$formkey];
+                }
+                $formlog->studentid = $stid; // We check is_numeric on this above.
+                $formlog->statusset = implode(',', array_keys($statusset));
+                $formlog->remarks = $value;
+                $formlog->sessionid = $sessid;
+                $formlog->timetaken = $now;
+                $formlog->takenby = $USER->id;
+
+                if (!array_key_exists($stid, $sesslog)) {
+                    $sesslog[$stid] = array();
+                }
+                $sesslog[$stid][$sessid] = $formlog;
+            }
+        }
+
+        $updateatts = array();
+        foreach ($sesslog as $stid => $userlog) {
+            $dbstudlog = $DB->get_records('attendance_log', array('studentid' => $stid), '', 'sessionid,statusid,remarks,id,statusset');
+            foreach($userlog as $log) {
+                if (array_key_exists($log->sessionid, $dbstudlog)) {
+                    $attid = $sessionatt[$log->sessionid];
+                    // Check if anything important has changed before updating record.
+                    // Don't update timetaken/takenby records if nothing has changed.
+                    if ($dbstudlog[$log->sessionid]->remarks != $log->remarks ||
+                        $dbstudlog[$log->sessionid]->statusid != $log->statusid ||
+                        $dbstudlog[$log->sessionid]->statusset != $log->statusset) {
+                        
+                        $log->id = $dbstudlog[$log->sessionid]->id;
+                        $DB->update_record('attendance_log', $log);
+
+                        $updatedsessions[$log->sessionid] = $log->sessionid;
+                        if (!array_key_exists($attid, $updateatts)) {
+                            $updateatts[$attid] = array();
+                        }
+                        array_push($updateatts[$attid], $log->studentid);
+                    }
+                } else {
+                    $DB->insert_record('attendance_log', $log, false);
+                    $updatedsessions[$log->sessionid] = $log->sessionid;
+                    if (!array_key_exists($attid, $updateatts)) {
+                        $updateatts[$attid] = array();
+                    }
+                    array_push($updateatts[$attid], $log->studentid);
+                }
+            }
+        }
+
+        foreach ($updatedsessions as $sessionid) {
+            $session = $this->sessionslog[$sessionid];
+            $session->lasttaken = $now;
+            $session->lasttakenby = $USER->id;
+            $DB->update_record('attendance_sessions', $session);
+        }
+
+        if (!empty($updateatts)) {
+            $attendancegrade = $DB->get_records_list('attendance', 'id', array_keys($updateatts), '', 'id, grade');
+            foreach($updateatts as $attid => $updateusers) {
+                if ($attendancegrade[$attid] != 0) {
+                    attendance_update_users_grades_by_id($attid, $grade, $updateusers);
+                }
+            }
+        }
+
+        // Create url for link in log screen.
+        $params = $this->pageparams->get_significant_params();
+        // XXX - TODO
+        // Waiting for event for viewing user report(s) before creating derived event for editing.
+        /* $event = \mod_attendance\event\attendance_taken::create(array( */
+        /*     'objectid' => $this->id, */
+        /*     'context' => $this->context, */
+        /*     'other' => $params)); */
+        /* $event->add_record_snapshot('course_modules', $this->cm); */
+        /* $event->add_record_snapshot('attendance_sessions', $session); */
+        /* $event->trigger(); */
     }
+    
 }
 
 /**
diff --git a/renderer.php b/renderer.php
index 4f3fda7..8f365dd 100644
--- a/renderer.php
+++ b/renderer.php
@@ -1000,6 +1000,71 @@ class mod_attendance_renderer extends plugin_renderer_base {
         return $celldata;
     }
 
+    /**
+     * Construct take session controls.
+     *
+     * @param attendance_take_data $takedata
+     * @param stdClass $user
+     * @return array
+     */
+    private function construct_take_session_controls(attendance_take_data $takedata, $user) {
+        $celldata = array();
+        if ($user->enrolmentend and $user->enrolmentend < $takedata->sessioninfo->sessdate) {
+            $celldata['text'] = get_string('enrolmentend', 'attendance', userdate($user->enrolmentend, '%d.%m.%Y'));
+            $celldata['colspan'] = count($takedata->statuses) + 1;
+            $celldata['class'] = 'userwithoutenrol';
+        } else if (!$user->enrolmentend and $user->enrolmentstatus == ENROL_USER_SUSPENDED) {
+            // No enrolmentend and ENROL_USER_SUSPENDED.
+            $celldata['text'] = get_string('enrolmentsuspended', 'attendance');
+            $celldata['colspan'] = count($takedata->statuses) + 1;
+            $celldata['class'] = 'userwithoutenrol';
+        } else {
+            if ($takedata->updatemode and !array_key_exists($user->id, $takedata->sessionlog)) {
+                $celldata['class'] = 'userwithoutdata';
+            }
+
+            $celldata['text'] = array();
+            foreach ($takedata->statuses as $st) {
+                $params = array(
+                        'type'  => 'radio',
+                        'name'  => 'user'.$user->id.'sess'.$takedata->sessioninfo->id,
+                        'class' => 'st'.$st->id,
+                        'value' => $st->id);
+                if (array_key_exists($user->id, $takedata->sessionlog) and $st->id == $takedata->sessionlog[$user->id]->statusid) {
+                    $params['checked'] = '';
+                }
+
+                $input = html_writer::empty_tag('input', $params);
+
+                if ($takedata->pageparams->viewmode == mod_attendance_take_page_params::SORTED_GRID) {
+                    $input = html_writer::tag('nobr', $input . $st->acronym);
+                }
+
+                $celldata['text'][] = $input;
+            }
+            $params = array(
+                    'type'  => 'text',
+                    'name'  => 'remarks'.$user->id.'sess'.$takedata->sessioninfo->id,
+                    'maxlength' => 255);
+            if (array_key_exists($user->id, $takedata->sessionlog)) {
+                $params['value'] = $takedata->sessionlog[$user->id]->remarks;
+            }
+            $input = html_writer::empty_tag('input', $params);
+            if ($takedata->pageparams->viewmode == mod_attendance_take_page_params::SORTED_GRID) {
+                $input = html_writer::empty_tag('br').$input;
+            }
+            $celldata['text'][] = $input;
+
+            if ($user->enrolmentstart > $takedata->sessioninfo->sessdate + $takedata->sessioninfo->duration) {
+                $celldata['warning'] = get_string('enrolmentstart', 'attendance',
+                                                  userdate($user->enrolmentstart, '%H:%M %d.%m.%Y'));
+                $celldata['class'] = 'userwithoutenrol';
+            }
+        }
+
+        return $celldata;
+    }
+
     /**
      * Render header.
      *
@@ -1453,15 +1518,6 @@ class mod_attendance_renderer extends plugin_renderer_base {
             $summarywidth++;
         }
 
-        /* if (has_capability('mod/attendance:takeattendances', $context)) { */
-        /*     $table->head[] = get_string('action'); */
-        /*     $table->align[] = ''; */
-        /*     $table->colclasses[] = 'actioncol'; */
-        /*     $table->size[] = ''; */
-        /*     $colcount++; */
-        /*     $summarywidth++; */
-        /* } */
-
         $statusmaxpoints = array();
         foreach ($userdata->statuses as $attid => $attstatuses) {
             $statusmaxpoints[$attid] = attendance_get_statusset_maxpoints($attstatuses);
@@ -1863,7 +1919,61 @@ class mod_attendance_renderer extends plugin_renderer_base {
                 }
 
                 if (!empty($USER->editing)) {
-                    // TODO: add ability to edit attendance here
+                    $context = context_module::instance($sess->cmid);
+                    if (has_capability('mod/attendance:takeattendances', $context)) {
+                        // TODO: add ability to edit attendance here
+                        $celltext = '';
+
+                        // takedata needs:
+                        // sessioninfo->sessdate
+                        // sessioninfo->duration
+                        // statuses
+                        // updatemode
+                        // sessionlog[userid]->statusid
+                        // sessionlog[userid]->remarks
+                        // pageparams->viewmode == mod_attendance_take_page_params::SORTED_GRID
+                        // and urlparams to be able to use url method later.
+                        //
+                        // user needs:
+                        // enrolmentstart
+                        // enrolmentend
+                        // enrolmentstatus
+                        // id
+
+                        $nastyhack = new ReflectionClass('attendance_take_data');
+                        $takedata = $nastyhack->newInstanceWithoutConstructor();
+                        $takedata->sessioninfo = $sess;
+                        $takedata->statuses = array_filter($userdata->statuses[$sess->attendanceid], function($x) use ($sess) {
+                            return ($x->setnumber == $sess->statusset);
+                        });
+                        $takedata->updatemode = true;
+                        $takedata->sessionlog = array($userdata->user->id => $sess);
+                        $takedata->pageparams = new stdClass();
+                        $takedata->pageparams->viewmode = mod_attendance_take_page_params::SORTED_GRID;
+                        $ucdata = $this->construct_take_session_controls($takedata, $userdata->user);
+
+                        $celltext = join($ucdata['text']);
+
+                        if (array_key_exists('warning', $ucdata)) {
+                            $celltext .= html_writer::empty_tag('br');
+                            $celltext .= $ucdata['warning'];
+                        }
+                        if (array_key_exists('class', $ucdata)) {
+                            $row->attributes['class'] = $ucdata['class'];
+                        }
+
+                        $cell = new html_table_cell($celltext);
+                        $cell->colspan = 2;
+                        $row->cells[] = $cell;
+                    }
+                    else {
+                        if (!empty($sess->statusid)) {
+                            $status = $userdata->statuses[$sess->attendanceid][$sess->statusid];
+                            $row->cells[] = $status->description;
+                            $row->cells[] = $sess->remarks;
+                        }
+                    }
+                        
                 } else {
                     if (!empty($sess->statusid)) {
                         $status = $userdata->statuses[$sess->attendanceid][$sess->statusid];
@@ -1904,7 +2014,31 @@ class mod_attendance_renderer extends plugin_renderer_base {
             }
         }
 
-        $allsessions->detail = html_writer::table($table);
+        if (!empty($USER->editing)) {
+            $row = new html_table_row();
+            $params = array(
+                'type'  => 'submit',
+                'class' => 'btn btn-primary',
+                'value' => get_string('save', 'attendance'));
+            $cell = new html_table_cell(html_writer::tag('center', html_writer::empty_tag('input', $params)));
+            $cell->colspan = $colcount + (($groupby == 'activity')? 2 : 1);
+            $row->cells[] = $cell;
+            $table->data[] = $row;
+        }
+
+        $logtext = html_writer::table($table);
+
+        if (!empty($USER->editing)) {
+            $formtext = html_writer::start_div('no-overflow');
+            $formtext .= $logtext;
+            $formtext .= html_writer::input_hidden_params($userdata->url(array('sesskey' => sesskey())));
+            $formtext .= html_writer::end_div();
+            // could use userdata->urlpath if not private or userdata->url_path() if existed, but '' turns
+            // out to DTRT.
+            $logtext = html_writer::tag('form', $formtext, array('method' => 'post', 'action' => '',
+                                                                 'id' => 'attendancetakeform'));
+        }
+        $allsessions->detail = $logtext;
         return $allsessions;
     }
 
diff --git a/view.php b/view.php
index 748c3ed..40aafbf 100644
--- a/view.php
+++ b/view.php
@@ -62,14 +62,6 @@ if (!$pageparams->studentid) {
     }
 }
 
-$PAGE->set_url($att->url_view($pageparams->get_significant_params()));
-$PAGE->set_title($course->shortname. ": ".$att->name);
-$PAGE->set_heading($course->fullname);
-$PAGE->set_cacheable(true);
-$PAGE->navbar->add(get_string('attendancereport', 'attendance'));
-
-$output = $PAGE->get_renderer('mod_attendance');
-
 if (isset($pageparams->studentid) && $USER->id != $pageparams->studentid) {
     // Only users with proper permissions should be able to see any user's individual report.
     require_capability('mod/attendance:viewreports', $context);
@@ -79,6 +71,9 @@ if (isset($pageparams->studentid) && $USER->id != $pageparams->studentid) {
     $userid = $USER->id;
 }
 
+$url = $att->url_view($pageparams->get_significant_params());
+$PAGE->set_url($url);
+
 $userdata = new attendance_user_data($att, $userid);
 
 // Create url for link in log screen.
@@ -105,6 +100,19 @@ $event->trigger();
 
 $header = new mod_attendance_header($att);
 
+if (($formdata = data_submitted()) && confirm_sesskey()) {
+    $userdata->take_sessions_from_form_data($formdata);
+
+    redirect($url, get_string('attendancesuccess', 'attendance'));
+}
+
+$PAGE->set_title($course->shortname. ": ".$att->name);
+$PAGE->set_heading($course->fullname);
+$PAGE->set_cacheable(true);
+$PAGE->navbar->add(get_string('attendancereport', 'attendance'));
+
+$output = $PAGE->get_renderer('mod_attendance');
+
 echo $output->header();
 
 echo $output->render($header);