Haha, my trials don't count at all! :D
They take place after the deadline for assessment marks to be submitted to the BOS, so there really isn't much motivation to try at all.
So many of these classes are huge!
Anyway:
Software Design: 4 people
IPT: 6 people
Maths 3U: 6 people
Maths 4U: 2 people
Physics: 15 people
Adv. Eng: 37 people (3 classes)
SOR I: 50ish (4 classes)