K-12 public school facilities need regular investment to ensure student health and safety and support educational programming. Yet, the future of K-12 school facility funding in California is uncertain. A strong state-local partnership has existed that funded new construction, modernization, and other investments in public school facilities across the state since 1998, under the School Facility Program (SFP). The Governor, members of the legislature and other key stakeholders have identified concerns about the state's approach, but they have not yet formulated a consensus going forward on the state role and responsibilities for school district facilities. To inform the school facilities funding policy debate among the Governor, the state legislature and the public, this brief provides an analysis of data on facilities spending by California school districts. It proposes the following principles and descriptions to guide policy decisions about the State of California's facility funding role and provides data-driven indicators that can be used to evaluate the application of the principles: (1) Equity; (2) Local District Effort and Accountability; (3) Fiscal Stability and Predictability; (4) Facilities Adequacy; and (5) Program Simplicity. Finally it offers approaches to a state and local partnership for K-12 facilities that would advance the principles of "equity," "local district accountability," "fiscal stability and predictability," "facility adequacy," and "program simplicity." The following are appended: (1) Data and Methods; and (2) Brief History of the State of California's Funding for K-12 School Facilities. [For the accompanying policy brief, "Guided by Principles: Shaping the State of California's Role in K-12 Public School Facility Funding. Policy Research Working Paper," see ED573774.]