This project was funded in part by the Colorado Department of Higher Education Open Education Research Grant and the University of Colorado. Special thanks to our collaborators at University of Colorado Colorado Springs, University of Colorado Boulder, University of Colorado Denver, Colorado College, Colorado State University, Colorado School of Mines, and Aurora Science and Tech High School. Special thanks for support from the CU Strauss Health Sciences Library OER Initiative Committee, the CU Anschutz Instructional Design Team, and the Colorado State Anatomical Board.