This poster outlines the content, activities, and assessment data from a textbook affordability workshop for students. The workshop implemented a combination of informative content and participatory design activities that enabled the students to develop and build consensus around their own advocacy action items. By the time the workshop concluded, the team had identified three possible activities they could complete as a group to advocate for Open Educational Resources and other affordable learning materials on campus. Supplementary resources for viewers to use or adapt themselves are also available.