Research studies reveal that many administrators, classroom teachers, students, and parents have misconceptions about the role of library media specialists (LMSs) and how they impact student learning. Conversely, there is a growing body of evidence that demonstrates a strong correlation between quality school library media programs staffed by qualified LMSs and higher student achievement on standardized tests. Therefore, it is apparent that a disconnect exists between the perceived and real impact of school library media programs. In order to address this disconnect, LMSs can use data to advocate for their programs and for their profession. By combining results of published research studies in conjunction with data collected about their own programs, LMSs can prove the impact of their programs on student achievement and garner respect and support from their service populations. [For the complete volume, "Educational Media and Technology Yearbook, Volume 34," see ED602586.]