NAEP 1999 Long-Term Trend Summary Data TablesIntroductionThese data tables present long-term trend results in mathematics, reading, and science from the 1999 National Assessment of Educational Progress (NAEP). In 1999, NAEP examined long-term trends in the ability of nationally representative samples of students at ages 9, 13, and 17 in mathematics, reading, and science. In each subject area, the same sets of questions and tasks used in previous trend assessments were administered again using procedures replicated from previous assessments. A long-term trend writing assessment was also administered in 1999; however, the results of that assessment are undergoing evaluation for possible later release. A key component of the program was the contextual information collected from students, who were asked a series of questions about demographic information, their home environment, and experiences and instruction in the particular subject area being assessed. The long-term trend summary data tables are based on responses to these questions. The results include average scale scores and percentages for each response alternative, scale score percentiles, anchor point percentages, and percentages for cognitive questions. The results are enumerated for important demographic groups such as student gender, race/ethnicity, and parental education level. Tables are presented in three different file formats: HTML for viewing and printing through your web browser, CSV (comma separated values) for use in spreadsheets and data analysis applications, and PDF for viewing and printing using Adobe Acrobat Reader. For questions about the content of the NAEP summary data tables, please contact Sherran Osborne at sherran.osborne@ed.gov
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