Arkadelphia Promise's First Class Has 70 Percent Retention Rate by Arkansas Business Staff Posted 11/16/2012 10:29 am Updated 5 years ago The Arkadelphia Promise announces a college retention rate of 70 percent for its first class of Arkadelphia High School graduates, which exceeds both the state and national rates. Want the Full Article? Get Unlimited Archive Access for $19.95 per Year Readers must pay to access stories older than 15 days. Purchase Now Already have archive access? Login to view this article.