Alex is correct in what he states.. .. .A modular student MUST attend some kind of. .revision/cramer course, these usually last about 2 weeks. . .. .The weekend brush-up (call it what you like) is there as an optional extra and in no way replaces the 2 week courses. Often just one subject over a day or weekend.. .. .I believe the Perf; Systems, Nav & Met have been very popular.