Updated 在线授课接口定义 (markdown)

@@ -744,3 +744,38 @@ Response Body:
   "returnMsg": "success"
 }
 ```
+
+#16 学生端进入课堂接口
+
+接口地址：/teaching/student/checkin
+
+Request Method：GET
+
+Request params：
+
+|参数名         |是否必须   |说明     |参数类型  |
+|--------------|----------|--------|----------|
+|work_order_id |是        |工单id   |Long      |
+
+Response Body:
+
+```
+{
+    "data": {
+        "course_info": {
+            "teacherId": 1296861,
+            "groupId": "@TGS#2WHIZEBEO",
+            "chatRoomId": 212968615
+        },
+        "course_data": [
+            "0a29673921a26ffb5e5ee81ffed45a9e",
+            "0c8a151d1b5eb95bd435e2e1af23ea15",
+            "2156d9b3f571381b3eca40d6e9d6e1cc",
+            "23dc1178bf9b5f813911f4e798949233",
+            "e77a984dc4cbf889c081f8a53a36f859"
+        ]
+    },
+    "returnCode": 200,
+    "returnMsg": "success"
+}
+```