I have taught the use of 4x5s quite a lot during the 24 years I was with the university. My instruction was geared toward people who would be taking the cameras out and using them for assignments, then what to do once they came back to the darkroom.
What and how you will teach will depend on the needs and experience level of the students. For two days, I would not consider enlarging as a practical subject of the class...unless it was along the lines of one straight, quick-and-easy 11x14 print from one negative as a demo.
Better yet, buy a pack of this:
http://www.freestylephoto.biz/9012-Blueprint-Printables-Design-andamp-Print-Pre-Coated-Cyanotype
...and have everyone make a couple cyanotypes. LF is the cats meow for alt processes!
FIRST DAY
Intro to camera:
Set up cameras in teams of two
Explore cameras...lens operation, movement controls, focus, film holder use
Loading holders
Image control:
Take cameras out (or studio) and practise composing images w/o film.
Exposure controls:
Have everyone expose two sheets
Development of film
-----End of day one
DAY TWO
Examine dry film
Retake image if needed, two new images if not.
Develop film
Make cyanotypes