(SAN FRANCISCO CHRONICLE) More than 600 San Francisco teachers and classroom aides skipped school Tuesday to extend their Thanksgiving holiday, leaving district officials scrambling to find enough qualified adults to watch over students.

Officials called in every available substitute to cover the open classrooms but fell dozens short, requiring more than 100 central office staff members with teaching credentials to fill in for the day.

Across the San Francisco Unified School District, 432 teachers were absent – that’s about 12 percent of the district’s 3,700 teachers – with the vast majority calling in sick or taking a personal day. A few were off for bereavement or training, according to district data.

Note: Read our discussion guidelines before commenting.