At DC Met, as the District public high school is lovingly called by the adults and young people featured in 180 Days, school principal Tanisha Williams Minor races and even rhymes to prepare her students to take the DC Comprehensive Assessment System tests (DC CAS). A bright and beautiful young woman willing to bop and rap to engage and motivate her students, Minor code-switches with ease, transitioning from standard English to colloquial expressions and expressing authentic closeness with her students - and the communities from which they come. The DC CAS scores in math and English are one in a series of about 15 metrics that Minor says the District of Columbia Public Schools system uses to rate schools and determine the professional destinies of the adults who staff them. If students fail, the principal and teachers fail, and school staff members may lose their jobs.