Inequality in the United States has been rising in recent decades, while intergenerational mobility remains low. This means that absolute mobility--the extent to which children are economically better off than their parents--is declining, and intergenerational inequality is increasingly entrenched. A long literature suggests large returns to attending college and points to the importance of higher education for intergenerational mobility. Recent work by Opportunity Insights explores in more detail the role that different colleges play in promoting upward mobility, pointing to significant differences across colleges in the extent to which they enroll students from low-income families who have high earnings as adults. This report uses data produced by Opportunity Insights to focus specifically on students from middle-class families to understand patterns of attendance and upward mobility for the middle class. Building on the College Scorecard Data compiled by the U.S. Department of Education, the Opportunity Insights Mobility Report Cards use de-identified data from tax returns, linked to information about colleges, to construct a publicly available database for colleges in the United States.