While tracking it down I saw it was originally published in Playboy, so I doubt you saw the original in school. I remember reading too, but it was in some anthology.
Playboy used to publish anthologies of SF stories from time to time back then; wouldn’t be surprised if that’s where he and I read it. (These were just SF books, not adult entertainment.)
IIRC, the magazine was a compilation of fiction and non-fiction stories, it had movie information (Star Wars), and other stuff in it, as well. So it had to be late 70s. I got it in grade school. There were articles on the Concord and Space Shuttle (well, the design of it, anyway, since it didn't launch first until '81).
I wish I still had the magazines, the short stories in them were great.