They cited long stalled negotiations with the school district over wages and benefits as a major impetus for the walkout.

Schools closed as teachers in San Francisco began a strike Monday after struggling to come to an agreement with the district on pay and health care.

They cited long stalled negotiations with the school district over wages and benefits as a major impetus for the walkout.

They cited long-stalled negotiations with the school district over wages and benefits as a major impetus for the walkout.