During his campaign, Chicago's mayor-elect championed a "parent trigger" law similar to one in California, through which parents could force the removal of teachers and administrators at low-performing schools and bring in charter schools to replace them.

But on Tuesday, Parents United for Responsible Education spoke out against the measure, saying it would be too disruptive and could be misused by charter operators. PURE executive director Julie Woestehoff said that research shows local school councils' efforts to reform troubled public schools from within are working.

"It's really a huge opportunity for charter school operators to get a school building for themselves,"