Ratna Hi Ratna. I downloaded the Rachel USB as discussed above and then copied RACHEL to the moodlebox sd card into the /home/moodlebox/ directory. Followed the code as stated in Nicholas June 26 discussion.
When I tried the Rachel-pi (64gb) I found that I could only add the moodle as an option in Rachel not the other way around. (I'm not clever enough to recode it all)
By doing it my way, I force a log in to moodle first - then instead of logging in and out as they interact with material on the Rachel, I have a direct link which keeps them in Moodle - as mentioned above