a follow up memo says cca's student enrollment has declined by a third to save money immediately. cca is scaling back plans for a big festival celebrating a planned expansion. >> an abrupt resignation today by the president of the san francisco unified school board and mayor london breed, wasted no time finding a replacement. but as abc seven news reporter lena howland explains, this comes as the district faces declining enrollment and looming school closures. >> the first week of school wasn't even over yet when san francisco unified school board president laney mohamed resigned friday morning due to my personal circumstances, my immediate priority needs to be my health and my family and while i believe this to be a temporary setback, i truly am unable to give this role the attention it deserves. mohamed leaves office just two years after being appointed by mayor london breed, following the recall of three board members in a special election. board vice president matt alexander will step in as president and fill. kim was sworn in to fill a key vacancy left behind after the shuffl