Kevin Willmott, the adventurous screenwriter behind Chi-Raq (2015) and C.S.A.: The Confederate States of America (2004), turns to documentary for this urgent chronicle of a hard-up grade school serving some of the poorest children of Kansas City, Missouri. “Poverty is trauma,” one counselor explains, and there’s ample evidence of how it disrupts the children’s education: students move from one school to another because their families are transient, and the kids onscreen seem genuinely needy (in one scene a principal lecturing a child leaves the room for a moment and the child asks the cameraman for a dollar). Willmott constructs a story arc out of the school’s certification difficulties—it sued the state after losing its charter in 2013—but the real conflict, between the chaos of the children’s home lives and the structure required for them to learn, is ongoing and intractable.