Some quick observations:
She ducks the "what about the unions?" question entirely (not defending them, it's worth noting) -- and Stewart lets her.
She posits the notion that charter schools or choice reduce the sense of public obligation but ignores the reality that more affluent parents (including Ravitch herself) have "shopped" for better schools for their children for decades.
She was holding the noisy green key-keeper in her hand -- to keep from blocking her face using that hand, right?
See extended segments here.