Rosemary and John both have a passion for teaching. Their experience with classes ranges from mentored studies with a few students, to face-to-face classes with close to 100 students. Recently online classes that might be held synchronously or asynchronously with classes somewhere in between. What if you wanted to offer classes too many more students, who might be based anywhere around the world. Teaching at scale is the focus of this episode of Stats+Stories with guest Kristin Sainani (née Cobb). Kristin Sainani(née Cobb)(@KristinSainani) is a professor at Stanford University. She teaches statistics and writing; works on statistical projects in sports medicine; and writes about health, science and statistics for a range of audiences. She authored the health column Body News for Allure magazine for a decade. She is the statistical editor for the journal Physical Medicine & Rehabilitation; and has authored a statistics column, Statistically Speaking, for this journal since 2009. She is also the associate editor for statistics at Medicine & Science in Sports & Exercise. She teaches the popular Massive Open Online Course (MOOC) Writing in the Sciences on Coursera, and also offers an online medical statistics certificate program through the Stanford Center for Professional Development. She was the recipient of the 2018 Biosciences Award for Excellence in Graduate Teaching at Stanford University.