This document provides an introduction to the case method in policy school settings. Public leaders frequently face difficult decisions where outcomes are uncertain and time is of the essence. Under such conditions, decision-makers often rely on instinct rather than careful scientific or ethical reasoning. However, as this document explores, it is possible to educate future decision-makers with the reflexes for better judgement. Individuals can develop the skills of good decision-making with practice working through difficult decisions; exposure to diverse competencies, characters, and commitments; and the space to reflect on choices. The challenge lies in providing students with such opportunities. For those schools that wish to hone students' judgement in preparation for the hardest decisions of public policy, this document argues that the case method offers a promising pedagogical opportunity.