There are over 14,000 school districts across the country. According to this report from EdBuild, many of the 35,000 borders that divide these districts contribute to increasing economic segregation and create barriers to opportunity that is sometimes just out of reach. This occurs in large part because between 40-60 percent of schools’ fortunes depend on property values in the neighborhoods that surround them. According to the report, this reality creates incentives for wealthy areas to wall themselves off from their needy neighbors, keeping their property wealth for their own children’s schools and leaving other communities to fend for themselves. This report highlights examples of these divisions and so-called "island" districts, which are entirely encircled by another district and create barriers to opportunity.