Scientific argumentation is described as "a social process in which students build, question, and critique claims using evidence about the natural world." The Argumentation Toolkit curates resources meant to assist middle-school educators in understanding and applying this method. Readers may want to begin on the Intro page, which includes a few short videos and printable informational sheets detailing the basic premise and elements of scientific argumentation. From there, explore the Argument Elements page, which is broken into four sections based on four elements of scientific argumentation: evidence, reasoning, student interaction, and competing claims. Each section includes videos that describe suggested activities and strategies to implement these elements. On the Resources page, readers will find additional tools and guides, including videos with classroom scenarios (ranging in length from 2 to 20 minutes). The Teacher Learning page features four sessions with agendas (totaling three hours) meant as teacher in-service programming. Those looking for additional resources on scientific argumentation may want to browse the About page for a list of journal articles and conference presentations on the topic. The Toolkit is a collaboration between the National Science Foundation, Group 5 Media, Boston College, and the Lawrence Hall of Science at UC Berkeley.