The following clip shows a drill that helps gymnasts learn the Kasamatsu. At first, the gymnasts get familiar with performing a cartwheel into the pit. Then, as they improve, they add a side somersault. The next step would be to add a quarter twist. Now they are ready for the Kasamatsu.
These are some helpful progressive skills to introduce yurchenko vaults. First the gymnast roundoffs to a higher mat. The roundoff should be landed with the center of mass in front of the feet. In the next step the gymnast practices roundoffs to rebound on a springboard. When they demonstrate consistent rebounds, the gymnast can begin practicing some tuck somersaults and eventually layouts and high whip backs.