Consider how, in high-pressure cities, some elite preschools play on the fears of affluent parents of three- and four-year-olds. The Atlanta International School in Atlanta offers a “full immersion second language program”—for three-year-olds. Just pony up $20,000 for a year’s tuition. But that’s a bargain compared to the fees at Columbia Grammar School in New York, which will set you back $37,000 a year.

