This collective case study explores the strategies history, science and math teachers use to conduct close readings in their disciplines. Through qualitative analysis of forum posts and lesson plans submitted to a Massive Open Online Course (MOOC) designed as professional development (PD), this study examines the strategies history, science and math teachers reported using to conduct close readings in their discipline, as well as how these teachers conduct close readings after receiving professional development on reading strategies for their disciplines. Ultimately, the research showed that while more teachers reported using disciplinary literacy strategies following the PD, they did not necessarily report using the strategies that, according to experts in their fields, are considered to be the most important for their discipline.