Los Angeles Schools Close , as Workers Go on 3-Day Strike.<br />NBC News reports that service workers <br />of the country's second-largest public school district went on strike on March 21.<br />The Service Employees International Union Local 99 is demanding better pay and staffing.<br />According to Local 99, its members <br />earn an average of $25,000 a year.<br />NBC News reports that the union <br />"represents cafeteria workers, bus drivers, custodians and special education assistants.".<br />NBC News reports that the union <br />"represents cafeteria workers, bus drivers, custodians and special education assistants.".<br />NBC News reports that the union <br />"represents cafeteria workers, bus drivers, custodians and special education assistants.".<br />NBC News reports that the union <br />"represents cafeteria workers, bus drivers, custodians and special education assistants.".<br />Over 30,000 workers are <br />represented by the union.<br />United Teachers Los Angeles (UTLA), <br />which represents 35,000 teachers, <br />joined the strike in solidarity. .<br />The public schools and respect we deserve are within reach, UTLA, via Twitter.<br />It will be our collective action and solidarity that makes our visions for a better future into a reality in the present. Rain or shine, see you on the picket line!, UTLA, via Twitter.<br />All schools in the Los Angeles Unified School District (LAUSD) closed on March 21.<br />According to district data, there are about 430,000 K-12 students in the LAUSD.<br />L.A. Mayor Karen Bass said the city would help to provide student lunches at 21 locations amid the three-day strike.<br />L.A. Mayor Karen Bass said the city would help to provide student lunches at 21 locations amid the three-day strike.<br />The L.A. Zoo will provide LAUSD students with free admission during that time as well