Members of the University OER Committee reviewed a spreadsheet for textbooks ordered for Spring 2015 which included: ISBNs, titles, department, course, section, instructor, cost (both new and used), and enrollment (estimated and actual). [SEE SHEET 1]
They then computed two separate Enrollment X value metrics, using the actual enrollment of the course rather than the projected enrollment:
They then did a pivot table on the more conservative (i.e. used cost) to see the to-student-cost across textbooks. [SEE SHEET 3]
On 9/8/2015, the members of the Faculty Learning Community Exploring Open Educational Resources delivered a white paper entitled Open Educational Resources and Their Implementation at Miami University. The paper covers: the definition of OER, best practices, benefits and evidence, OER as a strategy to meet 2020 goals, implementing an OER culture at Miami University, a preliminary plan.
You can download a copy of this white paper at https://sc.lib.miamioh.edu/handle/2374.MIA/5285.
These slide decks, some with speaker's notes, can be used for your own presentations. Feel free to modify to suit your needs.