This document provides strategies and tools for school leaders to improve rigor in their schools. It discusses six components of improving rigor: culture, ownership and shared vision, managing data, professional development, advocacy, and shared accountability. For each component, it lists specific leadership tools and strategies. For example, to improve culture it suggests conducting a cultural audit by having staff list adjectives to describe the culture and observing artifacts in the school that convey messages about student success and rigor. The document is intended as a toolkit for school leaders to assess and strengthen various aspects of rigor in their school.