CHICAGO (AP) -- Nearly 20 percent of Illinois' public schools failed to perform well enough on standardized tests to meet federal guidelines.
But results released today show that number has improved from a year earlier.
In 2006, 686 schools -- or 18 percent -- didn't make "adequate yearly progress" under the No Child Left Behind law.
That number is better than a year earlier, when 992 schools -- or 26 percent -- failed to make adequate yearly progress, or A-Y-P.
Illinois State Board of Education spokesman Matt Vanover says districts are making a lot of progress and ensuring their students are prepared for tests.
The state uses standardized exams like the Illinois Standards Achievement Test and the Prairie State Achievement Exam to measure A-Y-P.
The board released the Prairie State Achievement scores today and I-SAT scores a week ago.