About the Authors

Phillip J. Grimaldi

Roles Conceptualization, Formal analysis, Investigation, Methodology, Project administration, Software, Visualization, Writing – original draft, Writing – review & editing

phillip.grimaldi@rice.edu

Affiliation OpenStax, Rice University, Houston, Texas, United States of America

Debshila Basu Mallick

Roles Conceptualization, Writing – review & editing

Affiliation OpenStax, Rice University, Houston, Texas, United States of America

Andrew E. Waters

Roles Conceptualization, Formal analysis, Writing – review & editing

Affiliation OpenStax, Rice University, Houston, Texas, United States of America

Richard G. Baraniuk

Roles Supervision, Writing – review & editing

Affiliation OpenStax, Rice University, Houston, Texas, United States of America

Competing Interests

Authors PJG, DBM, and AEW are employees of OpenStax, a non-profit OER textbook publisher based out of Rice University. RGB is the founder of OpenStax. This does not alter our adherence to PLOS ONE policies on sharing data and materials.