Employed by the Broward County School Board through the Community School program, he`s the only person in Broward who teaches cuong- nhu, a form of martial arts founded by a contemporary Vietnamese master named Ngo Dong. Each Monday and Wednesday evening, Wacks can be found at Plantation High School with his wife, Diana, who is a second-degree black belt who assists him in teaching; his daughter, Laurie, 10, a green belt; daughter, Rachel, 6; and his brother, Howard, another black belt.