An excellent interview by the famous Brazilian talk show host, Jô Soares.
p/s: You might want to skip the earlier part and go straight to 2 minutes 20 seconds where the interview with Kasparov really start.
..."there was an experience run in Germany by one of the German universities. They had classes, two classes. One had extra hours of mathematics. Another class, the same class, parallel, had extra hours in chess. At the end of the year, they compared the results in... mathematics! The class with chess won'....