A New Ratio for the Japanese Cram School - NYTimes.com

http://www.nytimes.com/2014/08/11/world/asia/a-new-ratio-for-the-japanese-cram-school.html

International education comparisons are often interesting. In Japan and other Asian countries, it's quite common for students to receive intensive tutoring in the evenings. In math, Japanese students are known for their ability to persist on long problems, seen in this quote: "Yuuki said that after two months, he was now able to solve math problems in 15 minutes, which was something that took him twice or three times as long before receiving private tutoring."