When asked whether he learned anything from his students at Cornell, Nabokov said categorically that he didn't, noting that he even "vainly tried to replace my appearances at the lectern by taped records to be played over the college radio."
"I do not know if I learned anything from teaching, but I know I amassed an invaluable amount of exciting information in analyzing a dozen novels for my students," he added. This much is true, and we are all richer for it. Here are twenty books Nabokov taught in his classes:
Anna Karenina by Leo Tolstoy
The Death of Ivan Ilyich by Leo Tolstoy
Dead Souls by Nikolai Gogol
Fathers and Sons by Ivan Turgenev
Crime and Punishment by Fyodor Dostoevsky
The Idiot by Dostoevsky
Demons by Dostoevsky
The Brothers Karamazov by Dostoevsky
Notes from the Underground by Dostoevsky (or “Memoirs from the Mousehole” as Nabokov called it)
Mansfield Park by Jane Austen
Ulysses by James Joyce
Madame Bovary by Gustave Flaubert
Swann’s Way by Marcel Proust
Bleak House by Charles Dickens
The Metamorphosis by Franz Kafka
The Strange Case of Dr. Jekyll and Mr. Hyde by Robert Louis Stevenson
Don Quixote by Miguel de Cervantes
Whatever Nabokov claimed about the benefits of teaching, it was during his professorships in the United States that he wrote what are considered his best works: Lolita, Pale Fire, Pnin, Ada or Ardor, The Real Life of Sebastian Knight. It seems that preparing a hundred lectures - about 2000 pages - on literature was a significant boon to his literary work.
Now, Nabokov's classes consisted purely of him reading these prepared lectures - and they're all available. You can read his books Lectures on Literature, Lectures on Russian Literature, Lectures on Don Quixote, Nikolai Gogol, and Notes on Prosody.