UNDATED (WTVB) A new study claims that American elementary school teachers reward girls with higher grades than boys for behaving better and paying attention in class. The report compares grades, standardized tests and behavior. It shows that gender favors girls in all subject areas.

Grades didn't always match up with test scores, as boys often received lower grades even when they scored higher than girls on standardized tests. The study concludes that girls received better grades because teachers rated them higher on their non-cognitive skills, like eagerness to learn and focus in class. The study will be published in the Journal of Human Resources