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In a new, preliminary look at high-school graduation rates across the country, Washington state, at 76 percent, tied for 32nd along with California, Utah and West Virginia.

This is the first time that all states have used the same method to calculate how many freshmen graduate four years after they enter high school.   In the past, different states used different measures, making comparisons difficult.

The U.S. Department of Education says the new numbers, which are for the 2010-11 school year, are preliminary, but will be finalized in a few months.

The state with the highest on-time graduation rate was Iowa, with 88 percent.  The lowest was Nevada, with 62 percent.