Interpreting NAEP Performance Levels: Please note that New Jersey students who perform at or above the NAEP-Basic level are meeting or exceeding grade-level expectations.
According to the NAEP performance-level descriptors . . . read more
New Jersey 2011 NAEP Grade 8:
All 50 states, the District of Columbia, and the Department of Defense Education Activity (DoDEA) schools participated on the 2011 science assessment at grade 8. No NAEP science assessments were administered at grades 4 and 8 in 2011.
Because of changes to the 2009 NAEP science framework, the 2011 NAEP science results should only be compared to the 2009 NAEP science results. The NAEP 1996, 2000, and 2005 science assessments were based on a NAEP Science Framework approved in 1991.
The 2009 NAEP science framework is organized around three subscales: physical science, life science, and earth and space sciences.
Overview of the 2011 NAEP Science Framework, Teresa Neidorf, American Institutes for Research
Grade 8: Key Findings for 2011
New Jersey Press Release [5/10/2012]
New Jersey Science Achievement vs the National Public Schools  
New Jersey Science Achievement Growth, 2011 vs 2009, Grade 8: 
National Public Science Achievement Growth, 2011 vs 2009, Grade 8: 
National Center for Education Statistics (NCES)
National Assessment Governing Board (NAGB)