Table S-12-1. Standard errors for the average reading scale scores and percentage of students at each achievement level, by grade: Selected years, 1992-2007

Academic Outcomes

Table S-12-1. Standard errors for the average reading scale scores and percentage of students at each achievement level, by grade: Selected years, 1992–2007

Grade, scale score, and achievement level	1992	1994	1998	1998	2002	2003	2005	2007
Grade 4
Average scale score	0.9	1.0	0.8	1.1	0.4	0.3	0.2	0.3
Percentage at each achievement level
Below Basic	1.1	1.0	0.9	1.2	0.5	0.3	0.3	0.3
At or above Basic	1.1	1.0	0.9	1.2	0.5	0.3	0.3	0.3
At or above Proficient	1.2	1.1	0.9	0.9	0.4	0.3	0.2	0.3
At Advanced	0.6	0.7	0.5	0.5	0.2	0.1	0.1	0.2

Grade 8
Average scale score	0.9	0.8	0.8	0.8	0.4	0.3	0.2	0.2
Percentage at each achievement level
Below Basic	1.0	0.9	0.9	0.8	0.5	0.3	0.2	0.2
At or above Basic	1.0	0.9	0.9	0.8	0.5	0.3	0.2	0.2
At or above Proficient	1.1	0.9	0.9	1.1	0.5	0.3	0.2	0.2
At Advanced	0.3	0.3	0.4	0.3	0.2	0.1	0.1	0.1

Grade 12
Average scale score	0.6	0.7	0.7	0.6	0.7	†	0.6	†
Percentage at each achievement level
Below Basic	0.6	0.7	0.9	0.7	0.8	†	0.8	†
At or above Basic	0.6	0.7	0.9	0.7	0.8	†	0.8	†
At or above Proficient	0.8	1.0	0.9	0.7	0.8	†	0.7	†
At Advanced	0.3	0.5	0.4	0.4	0.3	†	0.3	†
† Not applicable.
SOURCE: U.S. Department of Education, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), selected years, 1992–2007 Reading Assessments, NAEP Data Explorer.