TY was good to me, but I think it could have been better. As the article says, each school does it differently. We did a mini company, where we created knick knacks and tried to sell them. But the entire class of 30 students was one company, which was therefore quite badly organised. I remember the teachers saying that they wouldn't do it that way in future years. There was also orienteering.
And we still did some academic classes. Maths, anyway. And I think some others.
In my school, most of the kids didn't do TY, so there was just one class in TY, which meant that the maths, in particular, was fairly basic: there weren't enough of us for streaming. And jumping back into higher level maths in Fifth Year was, frankly, a bit of a shock to the system.