CHILDHOOD OBESITY HAS INCREASED RAPIDLY IN RECENT DECADES. RISK FOR OBESITY INCREASES SHARPLY AFTER AGE 5 AND IS GREATER INLIMITED-RESOURCE FAMILIES. USDA'S SPECIAL SUPPLEMENTAL NUTRITION PROGRAM FOR WOMEN, INFANTS, AND CHILDREN (WIC PROGRAM)SERVES 9.3 MILLION LIMITED-RESOURCE, NUTRITIONALLY AT-RISK MOTHERS, INFANTS, AND CHILDREN UNDER AGE 5 IN THE U.S. WIC PROVIDES FREESUPPLEMENTAL HEALTHY FOODS, NUTRITION EDUCATION, BREASTFEEDING SUPPORT, AND HEALTHCARE REFERRALS. WIC IMPROVES DIET QUALITYAMONG LOW-INCOME CHILDREN, BUT PARTICIPATION IN THE PROGRAM DROPS AS CHILDREN AGE, PARTICULARLY AT AGES 2-4. NEW STRATEGIES ARENEEDED TO INCREASE THE USE OF WIC BENEFITS AND CONSUMPTION OF WIC FOODS, TO REINFORCE WIC NUTRITION EDUCATION BETWEENQUARTERLY VISITS, AND TO EFFECTIVELY USE TECHNOLOGY IN WIC NUTRITION EDUCATION. THE CHILDREN EATING WELL (CHEW) SMARTPHONEAPPLICATION (APP) DEVELOPED BY OUR TEAM ADDRESSES THESE NEEDS. THE OVERALL PROJECT GOAL IS TO ADAPT, DISSEMINATE, IMPLEMENT, AND EVALUATE THE CHILDREN EATING WELL (CHEW) MOBILE APPLICATION (APP), DESIGNED TO INCREASE WIC FAMILY BENEFIT REDEMPTION AND IMPROVE DIET QUALITY AND OTHER OBESITY RISK FACTORS AMONG PRESCHOOL-AGED CHILDREN, WHILE TRAINING THE NEXT GENERATION OF CHILDHOOD OBESITY PREVENTION RESEARCHERS AND PROFESSIONALS. OUR LONG-TERM GOAL IS TO REDUCE RISK OF OBESITY AMONG LOW-INCOME, PRESCHOOL AGED CHILDREN. THE OBJECTIVES ARE TO: (1) DEVELOP AND MAINTAIN VERSION 2.0 OF THE CHEW APP IN ENGLISH AND SPANISH, AND DISSEMINATE IT TO THE WIC PROGRAM TO IMPLEMENT IN WIC CLINICS ACROSS TN (EXTENSION); (2) CONDUCT PROCESS, OUTCOME, AND ECONOMIC EVALUATION OF THE CHEW APP IMPLEMENTATION IN THE TN WIC PROGRAM (RESEARCH); AND (3) TRAIN HIGH SCHOOL, UNDERGRADUATE, AND GRADUATE STUDENTS AND POSTDOCTORAL FELLOWS IN THE USE OF TECHNOLOGIES FOR CHILDHOOD OBESITY PREVENTION (EDUCATION).