Former Los Angeles mayor Antonio Villaraigosa, in an op-ed for the Wall Street Journal (7/21, Subscription Publication) titled, “Why Are Teachers Unions So Opposed To Change?” makes the case that public schools in the US are failing American children and that teachers unions are partially to blame due to their continued resistance to the reforms that Villaraigosa deems necessary. Villaraigosa says the unions ought not be as critical of the Obama Administration as they are. Villaraigosa also contends that the implementation of Common Core had a positive impact on Los Angeles’ schools.