Two modules complete a distribution. This demonstration can happen within a course, or in the semester following a course through a continuation or expansion of its work. A successful student in a special mastery-oriented course like Ann's would earn two modules and be done with the NS distribution. The less successful student could either contract to continue the work with Ann or go on in another course. Folks in John Reed's camp could have their students contract for mastery work on an individual basis in the Spring semester as a matter of course.
Continued work is evaluated, just as course work is, at the end of the semester.
Full-Year courses as per Alan's plan are worth two modules. We would have to insist that contracts for individual work be submitted at the beginning of the Spring semester, specify weekly contact until complete, and expire with no onus on the participating faculty in May. Walk-ins are not part of the system. All continuing work must grow out of a course. Advisors get cumulative reports. Students flagged or falling behind in December enjoy some form of added attention in Jan term.