Civil discourse is our most basic form of civic engagement. In a democracy, it is our best tool for collectively answering a society's most fundamental question: "What shall we do?" While most of us have no doubt participated in political discussions, engaging in civil discourse that is productive (i.e., dialogue that "fosters democratic goals" [59]) can be substantially more difficult. For example, when both sides of an argument view their beliefs as part of their identity [43],debating the

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... its of those beliefs without calling into question the merits of the individuals who hold them can be challenging. Ideally, a careful discussant might find common ground, previously obscured by the trappings of tribalism, or, at the very least, foster a mutual understanding of and respect for the values that inform beliefs they do not share. On the other hand, an unskilled discussant, perhaps one only interested in personal attacks or "winning arguments,"will likely only further entrench each party in the views of their political tribe. Engaging in productive civil discourse is a skill that needs to be explicitly taught, modeled,and practiced in the same way that students are taught and given opportunities to practice skills like finding the length of the hypotenuse or completing a Punnett square. Unfortunately, civic education often takes a backseat to so-called core subjects like math, science, and English.Learning about civics may be relegated to elective courses, and opportunities to practice civic reasoning skills only afforded to the members of the school's debate club. And even in these environments where we would expect civic education to be a central focus, the emphasis onargumentation and persuasion, while undoubtedly crucial to civic learning, is insufficient and in some cases counter-productive to the type of dialogue that engenders commonality and collective problem-solving. In contrast to the status quo, we developed and tested the impact of a novel civic education intervention designed to provide students wi [...]