Because it’s outdated. In my ex school there was a PTE without half of the 7th period.
Well all the science textbooks in my school referred to any type of experiment as “witchcraft”.
Meh my school doesn’t have textbooks, we just read straight out of the bible
2 + 2 = uhh… um… JESUS! Man this stuff is hard, So There!
I quite like the word droogs, from Clockwork Orange’s russian-teenage-slang Nadsat.