diff --git a/core/urls.py b/core/urls.py
index 9e56999..01f91ee 100644
--- a/core/urls.py
+++ b/core/urls.py
@@ -7,13 +7,15 @@ from . import views
 from rest_framework import routers
 
 from users.views import UserViewSet
-from courses.views import CourseViewSet
+from courses.views import CourseViewSet, TopicViewSet, SubjectViewSet
 
 #API CODE
 router = routers.DefaultRouter()
 router.register(r'logs', views.LogViewSet)
 router.register(r'usersapi', UserViewSet)
 router.register(r'coursesapi', CourseViewSet)
+router.register(r'topicsapi', TopicViewSet)
+router.register(r'subjectapi', SubjectViewSet)
 
 urlpatterns = [
 	url(r'^$', views.login, name='home'),
diff --git a/courses/serializers.py b/courses/serializers.py
index 8cffb1c..07a7869 100644
--- a/courses/serializers.py
+++ b/courses/serializers.py
@@ -4,20 +4,28 @@ from users.serializers import UserSerializer
 
 class CourseSerializer(serializers.ModelSerializer):
 	#The set comes from the ManyToMany Relationship in django
-	#students = UserSerializer(source='students')
-	#professors = UserSerializer(source='professors')
+	students = UserSerializer(many=True)
+	professors = UserSerializer(many=True)
+	category = serializers.ReadOnlyField(source ='category.name')
 	class Meta:
 		model = Course
 		fields = ('name', 'slug', 'objectivies', 'content', 'max_students', 'create_date', 
-			'init_register_date', 'end_register_date', 'init_date', 'end_date', 'public', 'students', 'professors')
+			'init_register_date', 'end_register_date', 'init_date', 'end_date', 'public', 'category' ,'students', 'professors')
 
 class SubjectSerializer(serializers.ModelSerializer):
+	students = UserSerializer(many=True)
+	professors = UserSerializer(many=True)
+	course = serializers.ReadOnlyField(source='course.name')
+	category = serializers.ReadOnlyField(source ='category.name')
 	class Meta:
 		model = Subject
-		fields = '__all__'
+		fields = ('name','slug','description','visible','init_date','course','category','professors','course','students')
 
 class TopicSerializer(serializers.ModelSerializer):
+	subject = serializers.ReadOnlyField(source='subject.name')
+	owner = serializers.ReadOnlyField(source='owner.username')
 	class Meta:
 		model = Topic
+		fields = ('name', 'slug','description','create_date','update_date','visible','owner','subject')
 
 
diff --git a/courses/views.py b/courses/views.py
index 8ae0c07..1dbc2ad 100644
--- a/courses/views.py
+++ b/courses/views.py
@@ -1016,4 +1016,16 @@ class FileMaterialView(LoginRequiredMixin, LogMixin, generic.DetailView):
 class CourseViewSet(viewsets.ModelViewSet):
 	queryset = Course.objects.all()
 	serializer_class = CourseSerializer
-	permissions_clas = (permissions.IsAuthenticatedOrReadOnly)
\ No newline at end of file
+	permissions_class = (permissions.IsAuthenticatedOrReadOnly)
+
+class SubjectViewSet(viewsets.ModelViewSet):
+	queryset = Subject.objects.all()
+	serializer_class = SubjectSerializer
+	permissions_class = (permissions.IsAuthenticatedOrReadOnly)
+
+
+class TopicViewSet(viewsets.ModelViewSet):
+	queryset = Topic.objects.all()
+	serializer_class = TopicSerializer
+	permissions_class = (permissions.IsAuthenticatedOrReadOnly)
+
--
libgit2 0.21.2