Thank you very much Mary and Colin for your responses.
The thing is on the sandpit, I can't be able to find out the Site Administration block, only the Navigation block. I have tried and tried but can't be able to get it. Could you please suggest me a way to get this block up and running? Ah, for your information, the sandpit where the course is created has no relation to our real site. We have a course instructional designer who has built a sample of course structure for us on generic sandpit on the URL:
http://moodlesandpit.com/Courses/login/index.php
And we now want to copy her course structure to our real site. Hope this makes sense to you so you can be able to give me your advices.
Thank you.
Kind Regards
Trang Luu