Surely forgetting some:
grade 9
To Kill a Mockingbird
Romeo and Juliet
grade 10
The Adventures of Huckleberry Finn - I should revisit this or some other MT.
The Catcher in the Rye - Did not like this at the time.
Of Mice and Men
Antigone
A Clockwork Orange - For one of the books we read that semester you had to pick one from a list, this was my pick. My favorite at the time because of the language. I wanted to read more experimental stuff in general; in retrospect I should have gone to the library and asked for help finding it, but I didn’t know you could do that. Would I have known what to ask for?
grade 11
The Great Gatsby
Brave New World
The Scarlet Letter - Liked well enough at the time but have been meaning to give it another look.
Animal Farm - Did not like. At the time envious of the other class with the same teacher who had to read Heart of Darkness.
grade 12 - teacher did not encourage critical thinking about the books and only taught in preparation for a test
Macbeth
A Doll’s House
A Raisin in the Sun
Beowulf
Frankenstein
Les Misérables (abridged)
None of these individually had a huge effect on me—maybe A Clockwork Orange if any—though my grade 11 English teacher did. All we did in class was have (directed) group discussion about the books—no tests or worksheets or any of that junk.
Not in answer to the question but the book which affected me the most in high school was certainly The Count of Monte-Cristo, which I happened to read at the time but not for any assignment. If anything is directly responsible for my deciding to learn French it’s that book. The Sound and the Fury was also eye-opening but did not inspire me to spend years learning a language.