“Research from eleven states and over 4,000 schools documents that credentialed LMTs raise achievement scores anywhere from 8-20%. Support personnel alone in an LMC do not raise achievement but credentialed LMTs do. Why? Because the LMT concentrates on teaching and learning rather than on managing a warehouse. When there is no LMT, achievement suffers – its people rather than just things that make the difference.”
-Loertscher, David V. with Ross J. Todd. Evidence-Based Practice for School Library Media Specialists. Salt Lake City UT: Hi Willow Research & Publishing, 2003.