This report presents the findings for public four-year colleges and universities that participated in ACT's 2010 What Works in Student Retention survey. The report contains information pertinent to only these institutions. Appended are: (1) Data for Public Four-Year Colleges and Universities; and (2) What Works in Student Retention: Instrument. (Contains 15 tables.) [For the main report, "What Works in Student Retention? Fourth National Survey. Report for All Colleges and Universities", see ED510474.]