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Students in California’s primary and secondary public schools are underachieving compared with students in other states. In the 2012 annual report published by Education Week, California public schools received a "D" for K-12 student achievement and ranked 35 out of the 50 states. Some analysts attribute low student achievement to the quality of California’s public school teachers as they are the single most important predictor of student outcomes.Numerous factors affect teacher quality in an education system; professional development and dismissal policies are two widely discussed factors that have recently come under heightened scrutiny.