Student achievement in California has not rebounded after the precipitous declines of the COVID-19 pandemic, with English language arts (ELA) and math scores remaining well below prepandemic levels. Student attendance has declined dramatically, and trauma and time away from school have led to mental health challenges, delays in social development, and behavioral issues among students. It is in this context that the California Collaborative for Educational Excellence (CCEE) has launched the Intensive Assistance Model (IAM) pilot school-improvement project, which is designed to build new approaches for teacher collaboration and student support. The IAM pilot's goal is to support schools in implementing the Professional Learning Community (PLC) at Work model, which uses an intensive support and coaching process to empower teachers as instructional leaders through developing processes, structures, and culture that support collaborative planning, data analysis, and targeted interventions. The PLC at Work model has led to measurable impacts in student achievement. Realizing the model's potential requires the active engagement of district offices to align resources, remove barriers, and support effective teaching and learning systems.