Eighth-graders who received less than three hours of language arts instruction per week (256) scored lower than those who received between 3 and 4.9 (269) and those who received between 5 and 6.9 (264) hours of instruction.
NOTE: The NAEP reading scale ranges from 0 to 500. Some apparent differences between estimates may not be statistically significant. See complete data.
SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2009 Reading Assessment.