I think the PARENTS of the kids know- since they are the ones making the demands that the foreign teacher LOOK foreign (ie white) and they want them young (under the mistaken assumption that anyone over a certain age ceases to be "in touch" wtith the "real world") Wheter the students know, Ia m not sure and whether it would make a difference -well, the students in mostcases are not paying the bills-the aprents are - and thus the bosses cater to them. My experience is based oN China and south korea- of Taiwan and Japan I knwo nothing and thus say nothing :)