President Bush will today visit a charter school in Harlem, aiming to push Congress to pass a renewed version of the No Child Left Behind Act, Mr. Bush’s signature education law.

The president, along with his education secretary, Margaret Spellings, will tour the Harlem Village Academies charter school, where he will renew his calls for Congress to extend the act’s accountability measures. The visit also comes just before National Charter Schools Week, a celebration created in 2002 by the president, who is a strong advocate of charter schools.

“The president is highlighting charter schools specifically as a useful option for parents who are seeking choices for their children — especially children who are not achieving at their current schools,” a spokesman for the president, Blair Jones, said. The Harlem school, he added, “sets high standards and has worked in innovative ways to make sure all students achieve.”

The No Child Left Behind Act requires all schools to bring all students up to grade level in reading and math by 2014, and the founder of the charter school, Deborah Kenny, said she believed the school’s track record in quickly improving the performance of low-achieving students is the reason the White House chose her school for the president’s speech.

“They were aware of our students’ strong academic achievement,” said Ms. Kenny, who has been described as a “star” by the city’s schools chancellor, Joel Klein. “We take in kids that are really struggling, but they just get better and better, and stronger and stronger.”

At the Village Academies, where “bureaucracy is banished,” and the “entrepreneurial culture focuses on accountability,” the number of students reading and doing math proficiently has risen from a handful to more than two-thirds within a few years, Ms. Kenny said.

A spokesman for the city Department of Education, David Cantor, praised the president’s choice of the Village Academies for his visit.

“It’s terrific that the president is highlighting a charter school with such great success at educating the kinds of children the system has failed for so long,” he said.

The president of the Foundation for Education Reform and Accountability, a pro-charter schools group, Thomas Carroll, characterizing the school as one of the best in the state, said, “I think the president chose wisely a backdrop of what the future of urban education will look like.”

Mr. Carroll also noted that the recent increase in the statewide cap on the number of charter schools and the Bloomberg administration’s school reorganization efforts have recently drawn national attention — and also mirror many of the president’s own education plans.

Mr. Klein, who will accompany the president today and often repeats Mr. Bush’s line about the “soft bigotry of low expectations” in his own speeches, is currently pushing through a reorganization of the school bureaucracy that borrows from many of the major elements of the No Child Left Behind Act — including increased accountability for individual schools.

Also accompanying the president is Rep. Charles Rangel, the Harlem Democrat who chairs the Ways and Means Committee and who has been more critical of the No Child Left Behind Act in its current form.

In a recent article in The Hill, a Capitol Hill newspaper, Mr. Rangel wrote: “Education officials … are right in complaining that it has unfairly burdened school districts because it fails to provide sufficient funding for full implementation. That needs to be corrected.”

Mr. Bush faces some hurdles in getting the act reauthorized, and it is possible that Congress will wait until a new president takes office before revising the federal education law. The stop in Harlem is a part of an ongoing campaign by the president to convince lawmakers to reauthorize the law.

“He believes we need reauthorization this year,” Mr. Jones said.

In agreeing to add some flexibility to the law, Mr. Bush has been emphatic in saying the increased flexibility shouldn’t “water down” accountability.