SHAME ON YOU, SHAME ON ME: Thoughtful NYT Op-Ed from Mr. Bill Gates on why public disclosure of NYC teacher ratings is a bad idea. Most notably, Mr. Gates points out the fallacy of value-added ratings, adding that evaluations "must incorporate other measures of effectiveness, like students’ feedback about their teachers and classroom observations by highly trained peer evaluators." How would you feel being rated by your students? Do you have a good idea for an effective evaluation system? Tweet about it here.