Boston's turnaround strategy for underperforming schools involved 4 phases over 3 years and focused on 7 core elements: 1. Replacing school leaders and over 50% of teachers, securing additional funding, and extending the school day in phase 1. 2. Schools showed overall improvement in phase 2, exceeding growth and proficiency targets in math and English. Attendance also improved. 3. Phase 3 focused on high-quality teaching, progress monitoring, differentiated supports, and strategic use of time. 4. Partners provided data and academic supports while new systems focused on data-driven instructional cycles and progress reviews to achieve the goal of student and school success.