Who Has Seen the Wind, All Quiet on the Western Front, Romeo & Juliet, MacBeth (or as one former English professor of mine said, "That Scottish Play." He was a former stage actor and very superstitious about this to the point of covering his ears if anyone dared say the title of the play), Julius Caesar, Oedipus Rex. I remember reading The Outsiders in Junior High, which is another book I'd like to revisit some day.
I have a story about that. Back in undergrad, our department did a production of Mamma Mia. Since we're in Taiwan, a lot of people didn't know about the Macbeth superstition, so during a random discussion in rehearsals about Shakespeare, people started saying "Macbeth" out loud. I told them it's considered bad luck to say it in a theater setting. One girl said, "Really? You're kidding! Macbeth Macbeth Macbeth!"
That day she fell down on stage and hit her eye on part of the sets, cutting her eyeball and almost blinding her. She was able to recover in time to perform, although she almost had to go on stage wearing an eyepatch.
Yes yes, correlation, causation, and all that. But in our production of The Two Gentlemen of Verona the next year, she was the one telling people not to say Macbeth out loud.
As for stuff I've read in my English classes:
Roll of Thunder, Hear my Cry
Flowers for Algernon
To Kill a Mockingbird
The Catcher in the Rye
The Great Gatsby
Lord of the Flies
The Crucible
The Odyssey
Inherit the Wind
Shakespearean works including Romeo and Juliet, Macbeth, Julius Caesar, A Midsummer Night's Dream, and others I can't remember.
Other texts read in other classes:
1984
Frankenstein
A Streetcar Named Desire
Death of a Salesman
The Picture of Dorian Gray