Tetsuya Miyamoto runs an annual school in his native Japan, which is based on a first-come first-serve basis and is an exam-free method. It's referred to as the Miyamoto Method: “The Art of Teaching Without Teaching.” As part of his curriculum, Miyamoto sets up a time limit and has students attempt KenKen puzzles. Questions are neither permitted, nor solutions provided. Miyamoto only communicates whether the answer is correct!

Over 80% of Miyamoto's most recent students were accepted to the 6 most prestigious middle schools in the Tokyo metropolitan area. That’s not all: for the past five years his students have dominated Japan’s “Math Olympics," the country’s top competition in mathematics for students ages 11 - 15. His current and former students have won the top prizes.