As I grow older, I realize that a number of the great literature really are great. Not altogether sure if it's due to a maturing mind, or if it's simply that when I was younger I was still mired in the falsehoods being taught.
If the latter, great literature is still useful for teenagers as long as they aren't wallowing in a false reality (re: Feminism). If the former, then English classes would be greatly improved by not trying to trudge through dreary poetry with "important" ideas, but rather something more akin to fables - entertaining stories that still have important concepts to discuss and swallow.
Literature classes might better be mixed with philosophy classes, anyway.