Supporting Healthy Marriage (SHM) was a yearlong voluntary marriage education program to help strengthen couples' relationships. SHM had small sustained positive effects on marital quality more than a year after the program ended but did not achieve its objectives of leading more couples to stay together or improving children’s well-being.Supporting Healthy Marriage (SHM) was a yearlong voluntary marriage education program to help strengthen couples' relationships. SHM had small sustained positive effects on marital quality more than a year after the program ended but did not achieve its objectives of leading more couples to stay together or improving children’s well-being.