Educational Inequality is the difference in the learning results, or efficacy, experienced by students coming from different groups. Educational efficacy is most often measured by grades, GPA scores, test scores, drop-out rates, college entrance statistics, and college completion rates. Unequal educational outcomes are attributed to several variables, including family of origin, gender, and social class. Achievement, earnings, health status, and political participation also contribute to educational inequality within the United States and other countries.