The WMS revision groups are a chance for people who are struggling to
understand a module to meet in a reasonably interactive setting, led by an
undergraduate who has taked the exam in said module.

These are designed to be a little bit more informal than revision lectures
given by academics, and although the people leading them will not be quite
as knowledgable as the lecturer, they will be in a better position to
remember what it is like to not understand it all.