students in chicago. parents like laurie left scrambling. she supports teachers but doesn't agree with the union's actions. >> i'm really, really mad. students belong in school. remote learning doesn't work. frankly, i'd rather school have been canceled today than have my son sit in front of a chromebook again. >> reporter: the chicago teachers union voting to refuse showing up in person for work and asking for a return to remote learning, citing concerns over covid-19 safety. >> don't keep using us as sacrificial lambs saying that it's safe to be in schools. it's not. >> reporter: the district canceled classes on wednesday in response and before the unions vote, mayor lightfoot made it clear she wants students in the classroom. >> the schools are safe and the doctor has said that and we know it because of the hundreds of millions of dollars that cps has invested in our schools from ventilation to hepa filters to