diff --git a/courses/serializers.py b/courses/serializers.py
index 3309f1e..3dcf85b 100644
--- a/courses/serializers.py
+++ b/courses/serializers.py
@@ -19,7 +19,7 @@ class MiniLessonSerializer(serializers.ModelSerializer):
 
     class Meta:
         model = Lesson
-        fields = ('title', 'free', 'token')
+        fields = ('title', 'free', 'token', 'is_hm')
 
 
 class LessonSerializer(MiniLessonSerializer):
diff --git a/progress/migrations/0008_auto_20180227_1803.py b/progress/migrations/0008_auto_20180227_1803.py
new file mode 100644
index 0000000..b1cd9b6
--- /dev/null
+++ b/progress/migrations/0008_auto_20180227_1803.py
@@ -0,0 +1,24 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.6 on 2018-02-27 18:03
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('progress', '0007_progresslesson_last_update'),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name='progress',
+            name='hidden_lessons',
+        ),
+        migrations.AddField(
+            model_name='progress',
+            name='only_watch',
+            field=models.BooleanField(default=False, verbose_name='Только просмотр'),
+        ),
+    ]
diff --git a/progress/models.py b/progress/models.py
index 12a4274..2a6e5dc 100644
--- a/progress/models.py
+++ b/progress/models.py
@@ -7,16 +7,12 @@ from lms.tools import get_empty_list
 
 
 class Progress(models.Model):
-    hidden_lessons = ArrayField(
-        models.UUIDField(verbose_name="Токен урока", unique=True, editable=False),
-        default=get_empty_list,
-        verbose_name='Список скрытых уроков',
-    )
     teacher = models.ForeignKey(to=settings.AUTH_USER_MODEL, verbose_name="Преподователь по умолчанию",
                                 related_name='teacher_progress')
     user = models.ForeignKey(to=settings.AUTH_USER_MODEL, verbose_name='Студент')
     course_token = models.UUIDField(verbose_name="Токен курса", editable=False)
     is_finish = models.BooleanField(verbose_name="Окончен ли курс", default=False)
+    only_watch = models.BooleanField(verbose_name="Только просмотр", default=False)
 
     def progress_status(self, sorted_token_list):
         """
diff --git a/progress/serializers.py b/progress/serializers.py
index e156bd3..ea27df1 100644
--- a/progress/serializers.py
+++ b/progress/serializers.py
@@ -8,7 +8,7 @@ class ProgressSerializer(serializers.ModelSerializer):
 
     class Meta:
         model = Progress
-        fields = ('lessons', 'course_token')
+        fields = ('lessons', 'course_token', 'only_watch')
 
     @staticmethod
     def get_lessons(self):
diff --git a/progress/views.py b/progress/views.py
index f744103..40aef45 100644
--- a/progress/views.py
+++ b/progress/views.py
@@ -23,18 +23,19 @@ class StudentWorkView(APIView):
     @staticmethod
     def get(request, teacher_token):
         client_status = request.GET.get('status', 'in_progress')
-        client_max_body = 50
         last_id = request.GET.get('last_id', 0)
         server_status = Q(status='fail') if \
-            client_status == 'not_done' else Q(status='wait') if client_status == 'in_progress' else Q(status='done')
+            client_status == 'not_done' else Q(status='wait') if client_status == 'in_progress'\
+            else Q(status='done')
         if request.user.is_authenticated() and request.user.groups.filter(name__in=['teachers', 'admin']).exists():
             try:
                 progress_lessons = ProgressLesson.objects.filter(
                     ~Q(progress__user__out_key=teacher_token),
+                    # ~Q(comment_tokens__len=0),
                     server_status,
                     checker__out_key=teacher_token,
-                    id__gt=last_id
-                )[:client_max_body]
+                    id__gt=last_id,
+                )[last_id:50]
                 return Response([ProgressLessonSerializer(i).data for i in progress_lessons], status=200)
             except ValidationError:
                 return Response("Bad request", status=400)