Sensei Ricky Spritz, 35, has taught karate to special-needs children for more than 15 years. “Ultimately what I hope kids get out of my class is a tool for life,” Spritz said. “I hope that they can ...

Hidden away behind a gray office complex in Northfield, Sensei (teacher) Jeff Kohn and his young student are performing a kata, a synchronized series of karate movements that’s as choreographed as a ...