<p>During his years working as an instructional coach for a national network of schools, Geoff Krall had the chance to witness several inspirational moments when math class comes alive for middle or high school students - when it is challenging but also fun, creative, and interactive. In <i>Necessary Conditions: Teaching Secondary Math with Academic Safety, Quality Tasks, and Effective Facilitation</i>, Krall documents the essential ingredients that produce these sorts of moments on a regular basis and for all students. They are Academic Safety, Quality Tasks, and Effective Facilitation.</p><ul><li>Academic Safety: Krall implements equitable classroom experiences that help fight stigmas associated with race and gender in schools. This allows students to feel socially and emotionally secure while nurturing their identities as mathematicians and increasing engagement during classroom discussions</li><li>Quality Tasks: Teachers can adapt or create dynamic, student-centered lessons that br