Over half of eighth-graders had teachers who reported covering the historical periods before 1815 and the period from 1815 to 1865 for six weeks or more, while approximately 58 percent of students had teachers who did not cover the period from 1945 to the present.
NOTE: Detail may not sum to totals because of rounding. Some apparent differences between estimates may not be statistically significant. See complete data for the following time periods: Before 1815
, 1815 to 1865
, 1865 to 1945
, 1945 to present.
SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2010 U.S. History Assessment.