
| Sample | New blocks | Blocks common to 2004 and 1999 |
|---|---|---|
| Age 9 | M23, M24, MX51, MX52 | M21, M22 |
| Age 13 | M23, M24, MX51, MX52 | M21, M22 |
| Age 17 | M22, M23, M24, MX51, MX52 | M21 |
| SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2004 Mathematics Long-Term Trend Assessment. | ||