Thank you so much, Firat. I installed Moodle v2.3 in my Mac, and the problem is I cannot find the folder, which I upload the HTML file (my netlogo modle), in any where of my Mac. So I tested in uploading a picture and try to find the location of the folder. However, the url of the picture I uploaded showed "
and there is nothing after " pluginfile.php" (as attached).
Similarly, I cannot fine the GHG.jpg from any folders in my Mac as well.
Also, I tested in 2 ways as below and still didn't work.
1) Manually create a Netlogo directory in where I installed Moodle v2.3, and put the HTML file, my model file (ending in .nlogo), and the file NetLogoLite.jar into this directory. Then did the uploading process again, but still showed "class org.nlogo.lite.Applet not found".
2) I put the HTML file, my model file (ending in .nlogo), and the file NetLogoLite.jar into a directory where I installed NetLogo, and did it again. It was the same result.
I still struggled with this. If you or someone can help more, I do much appreciate.