My 2 years of O Level English was interrupted because the teacher broke her leg skating (at a weekend do the school arranged) and we had a succession of supply teachers, none of whom had done that book. One was American, and she did some contemporary US poets with us, one of whom used the word "fuck".
When the original teacher returned, everything got compressed - including not really doing any language work (because we were all pretty OK at that).
So it's possible some debate and discussion was skipped.
The play we did was John Galsworthy's "Strife".