Jeffrey and Tammy Tronvold of Fairfax, IA and Todd Ballard of Marengo, IA are pleased to announce the engagement of their daughter Carissa Destiny Ballard, to Matthew David Untiedt, son of David and Sheryll Untiedt of Shueyville, IA. Carissa, a 2008 graduate of Prairie High School, will receive her degree in elementary education from the University of Iowa in May. She is currently student teaching in the Cedar Rapids area. Matthew, a 2007 graduate of Prairie High School, also graduated from the University of Iowa in 2011 with a bachelor's in marketing. He is an Assistant Store Leader at Scheels in Coralville. The happy couple met in middle school and plan to exchange vows on June 1, 2013 at the First Presbyterian Church in Cedar Rapids. A reception will follow at the Cedar Rapids Marriott.