Hi Al,
The title of your post is quite different to the content so I’m a little confused. Are you looking for free editing software or are you looking to hear accounts of a FC to PP change over?
If your students are fairly well acquainted with the layout of Final Cut it really shouldn’t be an issue for them. I myself used Final Cut as a student and changed to Vegas first and lastly to Premiere Pro; none of them are all that different and it shouldn’t take longer than a few hours to adjust for doing the basics. Since the title of your course is ‘Intro to…’ I’m guessing the basics will cover it.
If you’re looking for decent free editing software here’s a list
https://www.techradar.com/news/software/applications/best-free-video-editing-software-9-top-programs-you-should-download-1136264
For what it’s worth, I find that youtube’s very basic free editor or window’s movie maker are as good as any of the others out there (meaning not very good). Hope this helps.
Evan