The president of the Acalanes Union High School District governing board says she will step down after nine years as a trustee.
Vanessa Crews, appointed to the board in 2001 and subsequently re-elected in 2002 and 2006, said she will not run in November for another term.
"It has been an honor and a privilege to serve a community that shares my passion for the education of our young people," she said. "I will miss the many parents, students and community members I've come to know over the years and I will especially miss working with the talented staff and teachers of the Acalanes Union High School District."
Three seats on the school board will be up for re-election in November.
Crews threw her support behind incumbents Tom Mulvaney and Richard Whitmore and Orinda resident Susie Epstein.
Mulvaney and Epstein, co-chair of the successful Measure A parcel tax campaign, qualified for the ballot earlier this week.
The district includes four high schools in Lafayette, Moraga, Orinda and Walnut Creek.