Science fiction & fantasy short stories suitable for English lessons

[pseudomonas]

I spent the weekend with a friend who is an English teacher (that is, teaching literature to native English speakers, not teaching English as a second language), and in talking about texts, it emerged that their school doesn't really have much in the way of science fiction / speculative fiction / fantasy taught at any point, and they thought that it might be nice to study some for an upcoming short-story set of lessons, but they were not as conversant with those genres as with more traditional literature. So, I asked on Twitter (see first comment), and will ask again here, since I know any number of you are involved in SFF fandom, and because it makes a better repository for discussion:

What SFF short stories would you recommend for an English teacher to study with a class of 13-14-year-olds?

Comments

Extracts of comments from Twitter

[pseudomonas]

lizwithhat: How to Serve Man. The Nine Billion Names of God. The Ones Who Walk Away From Omelas. Franchise. Marionettes, Inc. All ones I read at that age and can still remember by name, so they definitely made an impact

marnanel: P J Plauger's "Child of all ages" [themes thought particularly appropriate for that age-group]

ArdsleyWooster: Asimov's "Nightfall". Or there's a whole set in the anthology "21st Century Science Fiction" - some are suitable.

marnanel: http://www.multivax.com/last_question.html

[Non-public] "I liked a lot of Fred Pohl's 50s stuff at that age -- simple high-concept, funny stuff. Don't know if it'd appeal now."

miss_s_b recommended Ursula Le Guin and http://www.neilgaiman.com/works/Books/Smoke+%2526+Mirrors/

pseudomonas: my top-of-head thoughts were Lem, Egan, Asimov...

Re: Extracts of comments from Twitter

[sparrowsion]

Big second to "The Ones Who Walk Away From Omelas".

I kind of want to suggest "Aye, and Gommorah" on the grounds that that's a great age for it to have impact, but it would be a brave teacher to take it on.