The Administration for Children and Families (ACF), Office of Planning, Research, and Evaluation (OPRE) plans to solicit applications for Secondary Analyses of Data on Early Care and Education grants. Analyzing existing data sets may provide researchers an efficient and cost-effective method for answering critical research questions. This funding opportunity aims to support researchers conducting secondary analyses of data to address key questions of relevance to the goals and outcomes of programs administered by ACF, in particular the Child Care and Development Fund (CCDF) and Head Start/Early Head Start (HS/EHS). Researchers may conduct secondary analyses of survey, program evaluation, or administrative data. Data sets from primary research and evaluation may also be candidates for secondary analyses. A data set may be used by itself or may be linked to another data set or database to best address the research questions proposed. For further information about OPRE, see http://acf.hhs.gov/opre. For information about the Office of Child Care (OCC) and the CCDF, see http://www.acf.hhs.gov/programs/occ/about/what-we-do. For information about the Office of Head Start (OHS) and HS/EHS, see https://www.acf.hhs.gov/ohs/about/what-we-do.