A Brooklyn teacher who was arrested in 2011 on charges of drugging and raping a middle school student is demanding that the city let her keep her teaching job, according to a new lawsuit. Claudia Tillery, 45, argues in papers filed in Manhattan Supreme Court that she was acquitted of all criminal charges in April 2014 and the Department of Education’s hearing officer improperly used sealed evidence, DNA tests and the prosecutor’s testimony to toss her from the teaching post she's had since 1996.