Couples can catch up online. Instructors can direct them to http://www.catholicmarriageprep.com/make-up-sessions-registration 
where they can register for the session they missed, staying on track with the rest of the couples.
The couple will be charged a fee of $19.95 per class for this service, as Catholic Marriage Prep, LLC online instructors will handle the teaching.

The fee is an incentive to the couple to do everything possible to avoid missing a session at the parish for all but the most urgent matters, and to provide a hassle-free service for the parish.
The couple’s reviewed work will be sent to their live instructors, of course.