Average scale scores and percentages for grade 8 science, by how often students do hands-on science activities, gender and jurisdiction: 2011 and 2009
Year	Jurisdiction	Gender	Never or hardly ever		Once or twice a month		Once or twice a week		Every day or almost every day
Year	Jurisdiction	Gender	Average scale score	Percentage	Average scale score	Percentage	Average scale score	Percentage	Average scale score	Percentage
NOTE: The NAEP Science scale ranges from 0 to 300. Detail may not sum to totals because of rounding. Some apparent differences between estimates may not be statistically significant. Analyze results with NAEP Data Explorer. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2009 and 2011 Science Assessments.
2011	National	Male	142	3	152	25	157	56	159	16
2011	National	Female	138	2	146	25	151	56	153	16
2009	National	Male	140	3	148	25	154	56	157	17
2009	National	Female	138	2	144	25	150	56	153	17