Gallery: States with the worst schools

By Thomas C. Frohlich and Michael B. Sauter, 24/7 Wall St.

For years, American students have consistently ranked poorly compared to most developed nations. And according to a recently released study, the U.S. education system remains mediocre, receiving a C− grade, for the third year in a row.

The K-12 Achievement Index, one indicator in Education Week’s recently released “Quality Counts” report, measures key education outcomes and provides ranks and grades for each state based on their commitment to improve educational policies and practices. 24/7 Wall St. reviewed the states with the best and worst scores for K-12 achievement.

Yahoo Homes is publishing the states with the bottom 10 scores in K-12 achievement here. Click on the slideshow above to see them. To see the full report, including the states with the highest scores and the study methodology, go to 247WallSt.com: