Some parents think so. According to Kate Zernike's article, Fast-Tracking to Kindergarten?
Ms. Goldman, who works at an agency representing artists, took her son, Huxton, to Kumon last September, shortly after he turned 5, in an effort to make sure, she said, “that he wouldn’t be behind the curve” when he started kindergarten the next year.
If she was hesitant, her children’s preschool was “disgusted,” she said. But she saw immediate results — Huxton began reading, adding and subtracting — and Eze, newly 3, started soon after.
What do I think? I discuss my position on Kumon with my NYC private school admissions clients.
Oddly enough, you can find the Kumon article in the New York Times' "Fashion and Style" section.