He called for Cathie Black , Bloomberg 's nominee for New York City Schools Chancellor , to take part in public forums and criticized her for sending her own children to private schools .
As public advocate , de Blasio repeatedly criticized Mayor Bloomberg 's education policies .
de Blasio called for Cathie Black , Mayor Bloomberg 's nominee for New York City Schools Chancellor , to take part in public forums and criticized her for sending her own children to private schools .
As public advocate , de Blasio repeatedly criticized Mayor Bloomberg 's education policies .