 Following the defeat of incumbent mayor Adrian Fenty in the 2010 Democratic primary election, Fenty announced on October 13, 2010, that Rhee had resigned.Rhee launched a personal website, a Twitter account, and a Facebook page soon thereafter.Opponents of Rhee, arguing that she had not genuinely improved education in D.C. schools, maintained that improvement in test scores must have been due to cheating, and attempted to show that changes made on some students’ tests, in which wrong answers were erased and correct answers substituted, indicated a systematic pattern of answer-changing, presumably at Rhee’s direction.