This document discusses the evolution of librarians as learning specialists. It traces how over time from the 1950s to the present, standards and research have increasingly recognized librarians' instructional role in collaborating with teachers to help students learn. Where librarians were once seen mainly as keepers of materials and study hall monitors, they are now understood as curriculum leaders and designers who coach teachers and model best practices in learning. Research shows the instructional responsibilities of librarians have clearly developed over the past decades as they utilize new technologies and help design instructional activities and assessments.