L.A. Unified

Marshall Tuck, chief executive of Partnership for L.A. Schools, smiles as ACLU Chief Counsel Mark D. Rosenbaum, at lectern, announces the settlement with L.A. Unified over the role of seniority in teacher layoffs. (Lawrence K. Ho / Los Angeles Times / October 5, 2010)

The Los Angeles Board of Education approved Tuesday what would be a landmark court settlement that radically limits the traditional practice of laying off teachers strictly on the basis of seniority. The agreement would cap the number of those dismissals at virtually all schools in the nation's second-largest district.

The pact, approved unanimously after a two-hour closed