Enacted in 1997, the State Children's Health Insurance Program (SCHIP) represented the largest expansion of U.S. public health care coverage since the passage of Medicare and Medicaid 32 years earlier. Although the program has recently been reauthorized, there remains a considerable lack of thorough and well-designed evaluations of the program. In this study, we use school attendance as a measure of the program's impact. Utilizing state-level data and the use of fixed-effects regression techniques, we conclude that SCHIP has had a positive and significant effect on state average daily attendance rates, as measured by both SCHIP participation and eligibility rates. The results support the renewal and expansion of the program. (Contains 2 notes, 3 tables, and 2 figures.)