Initially, the National Blue Ribbon Schools program honored only secondary schools; it was later expanded to include primary schools. It was changed again to honor secondary schools and primary schools in alternate years and now honors secondary, middle, elementary, and K-8 and K-12 schools each year. In 2003, the program was restructured to bring it in line with the No Child Left Behind Education Law, placing a stronger emphasis on state assessment data and requiring schools to demonstrate high academic success. Schools must show how data are interpreted and used and how curriculum, instruction, professional development, and student support promote student success.