NEW YORK/SHANGHAI -- Ginny Feng still wonders if she did the right thing. Five years ago, when her son was 3, she decided not to start him in intensive math and Chinese language programs along with the rest of his peers. The 40ish-year-old human resources consultant from Guangzhou, in southern China, was worried that if her son learned the subjects ahead of time, he would not pay attention in class when he started elementary school.






