The "Integrated Approaches to Supporting Child Development and Improving Family Economic Security" project was conducted by Mathematica Policy Research and Northwestern University for the Office of Planning, Research and Evaluation (OPRE), in the Administration for Children and Families (ACF) at the U.S. Department of Health and Human Services. It focused particularly on programs whose goals are both to improve the economic security of families and to support the development and well-being of children. This brief describes a continuum of research and evaluation approaches that could help program leaders and staff create more robust programs offering coordinated services to low-income parents and their children. The brief can also help program funders plan descriptive research and evaluation that can inform program development and identify which programs are ready for an assessment of impacts. The brief first discusses how to build a foundation for data-informed program improvement, including how to use program data to assess whether the program is working as its leaders and staff envision. Then, it discusses how research partners can be helpful in supporting program development based on analysis of program data. Programs that have engaged in data-informed program improvement may be ready to participate in an impact evaluation, so the final section presents criteria to help program leaders and funders assess the readiness of a program for an impact evaluation.