Agriculture. Learning the business of farming and food. I would also recommend they take a course in mandarin, the dominant language spoken in Asia.
My guess is that is the last topic of study discussed at the dinner table for 99% of families. Agriculture and farming will be one of the most lucrative business opportunities this decade. (Un)fortunately, as the opportunity presents itself to the mainstream we will be churning out another batch of service professionals and finance majors dedicated to forming the next "crop" of Wall Street traders who push paper back and forth in a market just waiting to collapse. Click for larger image.