Favorite Books You Read In School

What are your favorite and least favorite books you read during your years in school (ie, ages 9 - 18 or so)?  If you have more than one of each, make a list.

Favorites:
   Watership Down
   Hitchhiker's Guide To The Galaxy (first 3 of series)
   The Giver
   All Quiet On The Western Front
   Lord Of The Flies

Least Favorites:
   The Fountainhead (Ayn Rand)
   Song Of Solomon (Toni Morrison)

wow, reading these posts reminded me of alot of my own favorites from way-back-when.  so what can i add that hasn't been posted?
CHRONICLES OF NARIA!!!  (C.S.Louis   these are awesome! just reread them too)
Great Train Robbery (Crichton)
Animal Farm (author escapes me)
most ambivilance for a book goes to Catcher in the Rye (Salinger).  i hated it, but i've read it 3 times...  what can i say?  it's a really good book.