01799nam 2200457I 450 991070579230332120170609103136.0(CKB)5470000002452480(OCoLC)989729189(EXLCZ)99547000000245248020170609d2017 ua 0engurmn|||||||||rdacontentrdamediardacarrierA quarter century of changes in the elementary and secondary teaching force from 1987 to 2012 /Richard Ingersoll, Lisa Merrill ; project officers: Chelsea Owens, Andrew Zukerberg[Washington, D.C.] :U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics,2017.1 online resource (80 unnumbered pages) color illustrationsStatistical analysis report"April 2017.""NCES 2017-092."Includes bibliographical references (pages 33-37).Quarter century of changes in the elementary and secondary teaching force Elementary school teachersUnited StatesStatisticsHigh school teachersUnited StatesStatisticsDemographic surveysUnited StatesStatistics.lcgftElementary school teachersHigh school teachersDemographic surveysIngersoll Richard M.38581Owens Chelsea1399580Merrill LisaNational Center for Education Statistics,GPOGPOBOOK9910705792303321A quarter century of changes in the elementary and secondary teaching force3465018UNINA