Fourth-graders who were given time almost every day to read books they had chosen themselves (223) scored higher than those who were given time less frequently to do so.
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.