GMTplus7, thank you for the link. I had never heard the term “parachute kids” before. What a sad story that is. I feel badly for everyone involved.
Searching for the term online, I found this article, which does give more detail into the phenomenon: http://www.nbcnews.com/news/asian-america/some-parachute-kids-hard-landing-american-schools-n397961.
There’s also the phenomenon of the “left-behind children” in China, at the other end of the socioeconomic distribution: http://www.economist.com/news/leaders/21674715-there-are-70m-reasons-ease-chinas-curbs-internal-migration-pity-children.