Update README.md

README.md

@@ -3,10 +3,9 @@
 If you're new, please use [this repo's wiki](https://github.com/ace-lab/pl-ucb-csxxx/wiki)
 to get started!
 
-# Using this repo as a template to make a new course?
+# Did you just have a course created for  you?
 
-If you are using this repo as a template to make your own course
-(highly recommended), your course repo's name should be `pl-SSS-CCC`, 
+If so, this repo was used as a template, and your course repo's name should be `pl-SSS-CCC`, 
 where `SSS` is your project
 institution name (`ucb`, `csulb`, `ecc`) and `CCC` is the lowercase course
 number at your institution (eg `pl-ucb-cs169a`, `pl-ecc-csci8`, etc).
@@ -18,7 +17,7 @@ repo will likely contain sensitive content such as exam questions.  Be
 careful who has access.  **All access to PL repos is by teams**, not
 by adding individuals, to keep access control manageable.
 
-* Delete the `elements` subdirectory, unless you specifically want to use
+* Delete (meaning `git rm`) the `elements` subdirectory, unless you specifically want to use
 the custom elements in here (see below for some documentation)
 * Delete the contents of `serverFilesCourse` and `clientFilesCourse`
 * Delete the contents of `courseInstances` (you'll add your own
@@ -28,6 +27,8 @@ your course's questions
 * Immediately update this `README.md` and `infoCourse.json` to
 reflect the info for your course, including inserting a valid UUID for
 the course.  You can run `uuidgen` at a shell prompt to make one.
+**Important.** Just about every type of thing in PL -- course, question, element, etc. -- has a UUID (Universally Unique ID).  You can generate one by typing `uuidgen` at a terminal window or by using the [UUID generator](https://www.uuidgenerator.net). For safety, in the template repo all UUID values have been set to "9999...".  **In your new repo, immediately `git rm` any files you do not need, and in the files that remain, replace every UUID with a fresh one.**
+
 
 **Note:** Although it has become customary to name the primary Git
 branch `main` rather than `master`, **do not do so for PL repos** as