Science 2011:National Assessment of Educational Progress at Grade 8

"The average eighth-grade science score increased from 150 in 2009 to 152 in 2011. The percentages of students performing at or above the Basic and Proficient levels were higher in 2011 than in 2009 (figure A). There was no significant change from 2009 to 2011 in the percentage of students at the Advanced level..."