KANSAS CITY, Mo. — States are bracing for plummeting high school graduation rates as districts nationwide dump flawed measurement formulas that often undercounted dropouts and produced inflated results.
Education wonks long have suspected the statistics used by some people to determine how their neighborhood high school is faring — or even where to buy a house — can be figured using various formulas that produce wildly different results.
Now, many states are facing a sobering reset: Some could see numbers fall by as many as 20 percentage points.
Liz Utrup, a spokeswoman for the U.S. Education Department, said graduation rate numbers will soon appear to decrease "across the board" as states move to a uniform calculation that requires them to track each student individually, giving a more accurate count of how many actually finish high school.
"Through this uniform method, states are raising the bar on data standards, and simply being more honest," U.S. Secretary of Education Arne Duncan said.
Most states are required to convert to the new calculation this year, but the number won't count as part of federal No Child Left Behind benchmarks until the 2012-13 school year. Schools that consistently miss those measures face sanctions.
All but two states — Idaho and Kentucky, which need more time to develop student tracking systems — will start submitting the new numbers to the federal government starting late this summer.
States that converted to the new formula already have seen drops ranging from modest to massive. Michigan had a nearly 10 percentage point fall when they made the switch in 2007. About half of states are not yet using the new calculation.
Florida's graduation rate remained about stable, at 79 percent, when it adopted the new graduation rate in the 2009-10 school year. It would have been nearly two points higher if it had continued under the old calculation.
States making the switch this year are offering estimates of expected dips and discussing the change in school board meetings. In Kansas, the graduation rate is expected to tumble from 89 percent to 80 percent, with one district in the state anticipating a 20-point drop. Georgia said its overall rate — now at 80 percent — could plummet about 15 percentage points.
"We're certainly concerned no matter what with that number under 100 percent," said Kelly Smith, superintendent of Belle Plaine schools in Minnesota, which is transitioning to the new formula this year. "The new system isn't changing what we're doing in our schools, and we need to get that point across."
Matt Cardoza, a spokesman for Georgia's Department of Education, said while he worries the public may think that high numbers of students are suddenly failing to finish school, the new formula could produce "a more accurate picture of how many of our students are actually finishing high school with a diploma."
Jay Greene, who heads the Department of Education Reform at the University of Arkansas, said he started studying graduation rates in 1999 because he determined many of them made no sense.
"The initial reaction was that I was mistaken, that I couldn't know," said Greene. "And I pressed the issue with reporters and at meetings and basically asked the question, 'If it's true that you have a 1 percent annual dropout rate, how come you have twice as many ninth and tenth and graders as you have graduates?'"
Much of the blame for past problems went to something called the "leaver method," a popular calculation for determining graduation rates that also has gained a reputation for being the most generous. The method, used by about half the states last year, works like this: If a school had 100 graduates and 10 students who dropped out from their freshmen to senior year, 100 would be divided by 110, giving the school a graduation rate of 90.9 percent.
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