A recent study shows that more years of school could help students get higher scores on intelligence tests. That was the finding of a study of teenage males in Norway. Now, other research shows that ___41___ activity may help students do better in their classes.

The research comes as educators in some countries are reducing time for activities like physical education. They are using the time ___42___ for academic subjects like math and reading.

Researchers at VU University Medical Centre in Amsterdam reviewed the results of fourteen studies, which included more than fifty-five thousand children, aged six to eighteen.