Section 649(g) of the Head Start Act, as amended by the Coats Human Services Reauthorization Act of 1998 (P.L. 105-285) required the Department of Health and Human Services (HHS) to conduct a national analysis of the impact of Head Start. The legislation also charged the Secretary to appoint an independent panel of experts to review and make recommendations on the design of a plan for research on the impact of Head Start within one year after the date of enactment of P.L. 105-285, to advise the Secretary regarding the progress of the research, and to comment on the interim and final research reports. There were three Reports to the Congress mandated in the legislation. The first of two required interim reports, summarizing the deliberations and recommendations of the Advisory Committee, was completed and transmitted to Congress in October 1999. The current Report to the Congress is being submitted to fulfill the requirements of a second mandated interim report to “describe the status of the research and preliminary findings of the research, as appropriate.” Thus, this current report will describe the background and purposes of the study, the progress made to date in implementing the study, the current activities being undertaken to conduct a field test and prepare for the full study, and the projected timeline for completing all phases of the study.