Nevada education officials acknowledge the state has much work to do in K-12 schools, but say the state's dead last high school graduation rate is misleading.
The rate calculated to 41.8 percent in a ranking earlier this year by the publication Education Week, while Nevada officials calculated the rate at 67.4 percent.
Some of the disparity comes when students fail the Nevada high school exit exam and are classified as non-graduates.
In the 2009-10 school year, 1,169 Nevada students fell in that category.
About half of states do not require students to pass an exit exam to graduate.
Over the next few years, states will move to a standard methodology for calculating the rates. Officials say that should level the playing field.