Juvenile Court Judge Zimmerman, from Shelby County, was guest speaker at the Ada Kiwanis Club last week.
Zimmerman is a graduate of O.N.U., as is his wife and three of their children.
He was joined by Amy Simindinger, who is the liaison between the Shelby County juvenile court and the schools.
Simindinger and Zimmerman visit schools to educate young people about the dangers of misusing cellphones.
Simindinger spoke about a Shelby County program called IMPACT (Imagine Making Positive Accountable Changes Together). She helped start the program in 2011 and the program is supported completely by the United Way.