Five years after the approval of the SAA/ACRL/RBMS Guidelines for Primary Source Literacy, RUSA has recently adopted accompanying Guidelines for Secondary Source Literacy for History. Taken together, these two sets of guidelines offer complete learning objectives for primary and secondary source literacy in the history classroom. This presentation discusses how the History Liaison Librarian at McGill University embraced change by incorporating the new guidelines into course/integrated instruction, and further compares the guidelines with the learning outcomes and expectations of the History Department to determine differences in how librarians and professors approach secondary source literacy. -- Kristen C. Howard, PhD, MISt (she/her) Liaison Librarian Humanities and Social Sciences Library McGill University 3459 McTavish Street, Montreal, QC H3A 0C9 Schedule an Appointment<https://outlook.office365.com/owa/calendar/KristenHoward@McGill.onmicrosoft.com/bookings/> mcgill.ca/library/librarians/kristen-howard<https://www.mcgill.ca/library/librarians/kristen-howard>