Fourth-graders who received less than three hours of language arts instruction per week (213) scored lower than those who received three or more hours of instruction (218, 224, 223, and 220 respectively).
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.