Original sentence: Introduce the 90 degree rotation for the front crawl tumble turn.Practice somersault at a wall - swimmers can swim to the wall and then tumble turn at arms-length away from the wall.Somersault - this is the first step in learning to tumble turn.This is the backstroke tumble turn
Edited sentence: Introduce the 90 degree rotation for the front crawl flip turn.Practice somersault at a wall - swimmers can swim to the wall and then flip turn at arms-length away from the wall.Somersault - this is the first step in learning to flip turn.This is the backstroke flip turn