Chemistry, trigonometry, and pre-calculus were the worsT.
For whatever reason in pre-cal I ALWAYS got sleepy in class. I was never tired in the periods before or after that one and I'd never once fallen asleep in a class up until I took that one, but entering that classroom was a better sleep aid for me than a barbiturate. I fell behind like two weeks in.
And chemistry and trig just never made sense to me