Are BJ , SH , TP all different classes for the same topic? Should we take them all?
You don’t need to worry about the different versions. Only
prepare the correct version for the lesson. I felt quite a bit stressed when I took the wrong one and there were different slides in it, haha. Which was no problem at all, btw.
If you want to repeat a lesson you could choose a different version for change. There is not much difference, butit could be helpful to have slightly different content.
TP has the traditional characters as well, this is also not a problem to have a look at them in parallel or simply ignore them.