Later on today, education historian Diane Ravitch is going to head out from her Brooklyn Heights home and make her way into the city to be a guest on tonight's "The Daily Show with Jon Stewart" for the first time since May 2003 (pictured). Perhaps they'll send a town car for her. There will be a green room of some sort, probably some water bottles and snacks. A makeup artist will offer to touch her up. If there's time between rehearsing bits and script rewrites, the host will come in and say hi and tell her how happy he is to have her on the show. Until the headsetted staffer comes to get her, Ravitch will likely sit quietly in her chair as she does before most of her speeches.The Comedy Central appearance will be a tremendous victory for Ravitch, who has been pushing to get on one of the two shows in the 11 pm time slot for almost a year now. It will be a happy moment, too, for all of the educators and parents who have welcomed Ravitch into their arms. For me, however, Ravitch’s
