Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Mean scores and standard deviation for each item in which pupils had to shade 3/4 or 4/5 of a given figure.
| Figure | Fraction | Grade 4 | Grade 5 | Grade 6 |
|---|---|---|---|---|
 |
3/4 | 89 ± 2 | 88 ± 2 | 92 ± 1 |
 |
3/4 | 58 ± 5 | 82 ± 2 | 86 ± 1 |
 |
4/5 | 66 ± 4 | 62 ± 5 | 86 ± 2 |
 |
4/5 | 55 ± 5 | 53 ± 5 | 69 ± 2 |
