The "Display a directory" resource type name is not at all friendly to "front end" users. The term "directory" is (AFAIK) principally used in a server context for Unix/Linux set ups. I suspect most teachers etc. are more familiar with the term "folder". Importantly the term "folder" is the one used in the course files area - using an alternative term to refer to folders doesn't make much sense.

Suggestion:

Change the references to this resource to;

"Display a folder" or (probably better) "Display folder contents"