He has promoted thousands of students to black belt and master levels of black belt including his wife Sharon Tosten, 8th degree black belt, Mark Russo, 6th degree black belt, Mike Semeriglia, 6th degree black belt, Mike Sautner, 6th degree black belt and Justin Smith, 5th degree black belt. Many of Grandmaster Tosten’s students have become world champion competitors. Black belts Nick Perdunn, Chris Millares, Mark Russo, Kevin Schlueter and Justin Smith have all achieved national and world sport karate titles. They have, in turn produced national and world champion karate competitors.