Yes √ I also saw the Lion King's black math, so I was curious to search their information on the Internet. First of all, from the beginning of stimulating students' interest in learning, they emphasized what are "Hacker's Thirty-Six Strategies", Rubik's Cube, Sudoku ... In addition, the Lion King Hacker Mathematics also subdivided the tedious mathematics course into 233 training books, including 3 18 knowledge points, which combined classroom learning with extracurricular activities. ! !