This is to me a very sad story about a world that wanted to forget everything. Meaning all of their problems. They tried to make their world perfect and all their ducks in a row.. but it doesn't work. One person must remember. The Giver is a story about loss and understanding.
I would use this on my 6th grade class to demonstrate thinking for yourself and not believing everything you hear. also i would use it to encourage them to explore "their " world more.