California is experiencing one of its most severe teacher shortages in two decades. Budget cuts and layoffs resulting from the recession contributed to a steep decline in the number of teachers in California, falling from a high of 310,362 teachers in the 2007-08 school year to 283,836 four years later. Recent efforts, including Proposition 30 and the Local Control Funding Formula, which, respectively, raised taxes for public education and transformed the state's school finance method, have helped to regrow California's teacher workforce. However, with sharp decreases in the supply of new teachers, there are still not enough qualified teachers across subject areas in many schools and districts to meet California's staffing needs. This ongoing teacher shortage threatens recent education initiatives in the state--new standards, curriculum, instruction, and assessments--that aim to better prepare all students for college and careers. [This brief summarizes two Getting Down to Facts II technical reports on teacher supply and demand in California: "Teacher Shortages in California: Evidence About Current Status, Sources, and Potential Solutions" (ED594735) and "Teacher Staffing Challenges in California: Exploring the Factors that Influence Teacher Staffing and Distribution" (ED594738).]