Hi Thomas,

One way is to basically create a new course for the new students and import the course files and activities through the Import function you'll find in the course management menu. Import course doesn't transfer student data, so all you copy is just the set up activities and the course layout.

From 3.9 onwards (May 2020), the intention is to have a separate 'copy course' functionality.

When you copy a course through the import functionality, you can set an end date or completion date on the old course, have it accessible for reference only. If you'd like to 'freeze' the course, you can use the experimental feature 'freeze context', found in Site admin > Development.