|Grade||Assessment spiral||Number of bundle types|
|4||U.S. history/geography assessment spiral||361|
|8||U.S. history/geography assessment spiral||216|
|12||U.S. history/geography assessment spiral||216|
|1 Because NAEP administered 50-minute blocks at grades 8 and 12 in the 2001 assessment, each bundle at grades 8 and 12 had to contain six times the number of booklets as were required at grade 4.
SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2001.