The primary source of federal aid to elementary and secondary education is the Elementary and Secondary Education Act (ESEA)--particularly its Title I-A program, which authorizes federal aid for the education of disadvantaged students. This report provides a brief overview of major provisions of the ESEA. It is organized by title and part of the act. Annual appropriations for ESEA programs are provided through the Departments of Labor, Health and Human Services, and Education, and Related Agencies (LHHS-ED) Appropriations Act, and are shown in this report based on the most recent data available from the U.S. Department of Education, Budget Service for FY2017 through FY2019. Table 2 provides ESEA appropriations for FY2016 and FY2017 to depict the transition from the ESEA as amended by the NCLB to the ESEA as amended by the ESSA. Table 3 provides authorizations of appropriations included in the ESEA as amended by the ESSA. The Appendix provides a list of selected acronyms used in the report.