Participants in this workshop series will examine the power of productive evidence-based student argumentation in elementary & middle school science. Participants will attend two 2-hr Zoom meetings and also engage in one asynchronous task. Participants will examine several free online resources, readings, classroom videos and strategies. Participants will engage in tasks that will include engaging students in productive argumentation during science learning, collecting snippets of student talk/argumentation and reflecting on implementation of student talk.