This paper analyzed the impact of school library programs on student achievement in the United States focusing on the following five studies: the Colorado Study I(1993), II(2000), the Texas Study(2001), the Missouri Study(2003), and the Illinois Study(2005). All five studies, which used correlation analysis, factor analysis, and multiple regression showed a positive and statistically significant relationship between school library programs and student achievement: That is when school libraries have higher levels of professional and total staffing, larger collections of print and electronic resources, and more funding, students tend to earn higher scores on state reading tests. This paper also investigated the NCLB Act in relation to enhancing children's literacy and school library reading programs.