a staggering 128 cases of sexual misconduct by teachers or school employees in new york city schools. all involving students. many of those recommended by investigators for removal, are still in our schools. what do the unions do? they protect them. they're helping those teachers keep their jobs. it's a scandal. and the candidates are silent. demand action. >> that was an ad for the parents transparency project, an education advocacy group. here with us now, former news anchor an co-founder of the transparency project campbell brown. campbell wrote in the new yo"ne daily news" about what inspired the group and how -- tell us. >> this started for me a little over a year ago. there were a number of cases that got a lot of attention in the new york papers about teachers who had been engaged in all kinds of behavior, sexual misconduct with students, who couldn't be fired. and at the time the mayor made,