From what I can gether from what my OH has said, you learn to write statements, you have lots of lessons (wernt listening when he told me what about) and are shown ways to restrain people. In the beginning weeks you get all your driving licences.
Not sure how it works now but the first 2 weeks were STA (i.e. drill, pistol training and getting a good beasting in the gym) weeks 2-4 were signals followed by an exercise, the next 4 weeks were Police Duties where you learnt the law, statements etc. The next 3 weeks were 140 beat ups, walk and talk through arrests and TAs, Interviews etc then 140s where you worked for a few weeks in a "mock" police station followed by Driver Training.
I believe it has all changed now, probably driver training first, who knows!