Thirteen of Roanoke's 29 city schools did not meet federal standards under the No Child Left Behind Act last year, according to statistics released Wednesday by the Virginia Department of Education. Those include both of the city's high schools and five of its six middle schools.

The results are similar to the previous year, when 13 schools were also found to have failed the marks.

The standard, known as Adequate Yearly Progress, or AYP, measures students in reading and math. Schools last year had to show that 77 percent of students passed Standards of Learning tests in English and 75 percent passed the tests in math in order to meet the federal benchmarks. The law also requires that students of different demographic groups pass the tests at the same rate. The standards become increasingly difficult every year until 2014, when all students will be expected to pass the state tests.

All schools in Roanoke and Alleghany Counties met the standards, as did schools in Lexington, Radford and Covington.

Montgomery County saw 11 of its 20 schools meet the standards.

Statewide, about three quarters of the schools met the federal marks.