Do we have any sci-fi buffs here? I don't have posting privileges on Observation Deck and need some help planning a unit.

I'm looking for an explanation of sci-fi and it's changes from the 1950s to now. Basically, what real life fears/worries are being reflected in art.

I'm planning a unit looking at a short story and movie/tv/clips from each decade and how they reflect the nation at large. If you have suggestions (middle school friendly) that'd be great.

Anyone got any suggestions?