How do I change the term length in a course.

Hi @Richard Pan -

Once a course is in use and attendance is taken, that field becomes disabled. If you're looking to make a copy of that course with an updated Length field, it's best to deactivate the existing, copy it, and then edit the field in the newly copied course.

If you're needing to do this in bulk, it's also possible to import new course records. You find this option in Core > System tools > Data import.

-Mike