Check-in-Editions.md

+## **ver 1.0** No Time-limitated Check-in
+Teachers and administrators can adjust the time of the course. There is no time limitation of check-in.
+![Image.text](https://csgitlab.ucd.ie/19206223/software-engproject-group9/-/raw/master/Stuweb/Wiki%20Image/Sprint3/sp3_teacher_adjust_course.PNG)
+![Image.text](https://csgitlab.ucd.ie/19206223/software-engproject-group9/-/raw/master/Stuweb/Wiki%20Image/Sprint3/sp3_admin_adjust_course.PNG)
+
+
+## **ver 2.0** Time-limitated Check-in
+Teachers can set up sign-in time for students with time limitation.
+![Image.text](https://csgitlab.ucd.ie/19206223/software-engproject-group9/-/raw/master/Stuweb/Wiki%20Image/Sprint4/4.1.png)
+![Image.text](https://csgitlab.ucd.ie/19206223/software-engproject-group9/-/raw/master/Stuweb/Wiki%20Image/Sprint4/4.2.png)
+    
+### author: Wu Xuan
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