Editors' pick: Originally published Aug. 2.

If you look at education levels across the 150 largest metropolitan areas in the U.S., as WalletHub has, there are some geographical trends worth noting among 20 metro areas that define the bottom of the list. California claims 35% of metropolitan survey areas (MSAs), and Texas is a close second with 30% of MSAs. WalletHub's methodology includes two major considerations: the "educational attainment" rank for each metro area and the "quality of education and attainment gap" rank. In plain English, attainment (weighted at 80%) refers to how many people have at least a high school diploma, how many have at least a bachelor's degree, and on up the chain through graduate school. Quality of education (weighted at 20%) is a little more nuanced and takes in the public school rankings in that metro area, average number of universities, total enrollment, and the "attainment gap" (or achievement gap). The wider the attainment gap (defined as the disparity between students grouped by socioeconomic status, race, and gender), the lower the raw score for that MSA. For those Americans who used to "Feel the Bern" over the last year, these scores paint a troubling picture of localized pockets of disadvantage. They also underscore the relationship between an undereducated populous and a low performing, as well as imbalanced, school system-which is to say: the two are mutually dependent.