| Days in school year (median) | Total instructional hours | Math scores, 15-year-olds | |
| Australia | 197 | 815 | 520 |
| Brazil | 200 | 800 | 370 |
| Denmark | 200 | 648 | 513 |
| Germany | 193 | 758 | 504 |
| Italy | 167 | 601 | 462 |
| Japan | 200 | 600 | 523 |
| Luxembourg | 176 | 642 | 490 |
| Mexico | 200 | 1047 | 406 |
| New Zealand | 194 | 968 | 522 |
| Norway | 190 | 654 | 490 |
| Russia | 169 | 845 | 476 |
| South Korea | 204 | 545 | 547 |
| Spain | 176 | 713 | 480 |
| United States | 180 | 1080 | 474 |
| Chart data is from a July 2010 Time magazine article chart. "Sources: American Sociological Review; Karl L. Alexander, Johns Hopkins University; Organization for Economic Cooperation and Development; National Center for Educational Statistics. Reported by Ruchika Tulshyan." | |||
