The Employment Retention and Advancement (ERA) project was launched in 1999 to identify and determine the effectiveness of different program strategies designed to promote employment stability and earnings growth among current or former welfare recipients and other low-income individuals. Using random assignment research designs, ERA tested 16 different program models in eight states and estimated effects over a three-to four-year follow-up period. The focus of this synthesis is primarily on the 12 programs that targeted more employable groups, as opposed to “harder-to employ” groups, such as individuals with known disabilities. Three of these 12 programs produced consistent increases in individuals’ employment retention and advancement, and the others did not. The project points to some strategies that succeeded in improving retention and earnings among low-income single parents and provides some lessons.