You may be trying to cast your net a little wide looking for a single (or even a few) books, articles, and movies that illustrate technology and its impact on our lives, privacy, culture, etc. You might be better off giving them a laundry list of books (I would stick to books for a high school level course) and giving them the opportunity to answer that extremely broad question in the form of a 5 page paper, or something along those lines. Almost none of them are under 200 pages... You're well within "short story / novella" lengths there, and you REALLY need to rethink that, even if it means turning this into an extra credit assignment. Is it possible that you're vastly underestimating the amount of reading time your teenage students have?
You've got a lot of material to potentially choose from, so why not let the students make their own choices? Besides, it makes reading 30 "original" responses that much more interesting when they're not all saying the exact same thing.
Some of my choices would include:
Gibson's All Tomorrow's Parties (actually the whole trilogy would be okay here)
Neal Stephenson's Snow Crash
Neal Stephenson's The Diamond Age
Neal Stephenson's Anathem (for the really brave students...)
Orson Scott Card's Ender's Game and probably Ender's Shadow too
Orson Scott Card's Pastwatch
Tad William's Otherland series, although this is probably too bulky to be feasible
Daniel Keys Moran's Long Run and The Last Dancer
Heinlein's Moon is a Harsh Mistress
Heinlein's Starship Troopers
Heinlein's Door into Summer
If you open up your page limit the options are almost endless. If you don't, you'll never find a single work under 200 pages that illustrates the things you want to illustrate. Especially not in fiction.