Kyle Walker, an assistant professor of geography at Texas Christian University, has created $4 visualizing US neighborhoods by educational attainment.
Each dot represents between 25-500 people over the age of 25, and each is color-coded based on how far those people have gone in school. Blue dots are graduate degrees, green are bachelor's, yellow are some college, orange are high school, and red is everything short of high school.
The map helps to solidify what are, for most people, likely abstract concepts. They confirm people with less education tend to live in the outer boroughs around Manhattan, for example, and that a single highway can separate rich and poor.
Here's how the maps shake out in various cities across the US.