In this series of provocations, we distill a series of arguments that we have heard from interviews with math researchers, teachers, teacher leaders, and publishers. We’ve chosen six of the most interesting lines of thinking to publish in advance of the Future of Math Teacher Learning conference to set the table with a set of ideas that we can debate, build upon, or discard. These provocations are not the “right” way to think about the future of math teacher learning, but they were six arguments that challenged our assumptions, sparked our thinking, and helped us imagine new ways of approaching teacher learning.