For more than 20 years, the Metropolitan Regional Career and Technical Center (known as the Met) has been personalizing learning to meet students' interests and needs. The Met, which today is a network of six small, public high schools in Providence and Newport, Rhode Island, is the founding school of Big Picture Learning, a network of more than 65 diverse schools that use innovative models to make learning meaningful and tailored to students. One tool that has been helpful in professional learning efforts is the method of improvement science -- using short cycles of inquiry to continuously iterate on and enhance the programs and supports for educators. This method is used to create more consistency and coherence in how educators review student work and use the results to drive further instruction, especially in math. Overall, this process of short cycles of inquiry isn't just the ability to reflect, plan, and implement well. It also stokes a larger conversation about what goals should be and remain the key targets and why. It causes faculty to question and challenge assumptions that may need to be clarified, understood better, or eschewed and replaced. It creates fertile space for deeper, broader, and more fulfilling professional learning that enables better service to students and families.