The average level of experience among teachers in South Dakota's Sioux Falls School District has declined from 16.3 years in 2007 to 13.8 in 2009, or lower than the statewide average. This decline is concerning some educators who say that as experienced teachers retire and are replaced by novice instructors, education could suffer. Teachers continue to improve during their first two decades of teaching and make the most strides during the first five years, according to a 2007 report by the Washington State Institute for Public Policy.

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