At a press conference this morning at Ward 7’s Plummer Elementary, Mayor Adrian Fenty and D.C. Schools Chancellor Michelle Rhee happily announced that student performance on the D.C. Comprehensive Assessment System (DC-CAS) exams show improvement in reading and math at both the elementary and secondary levels. According to a release, elementary schools scored 46 percent proficient in reading, up 8 points from 2007, while math scores rose 11 points. Secondary schools showed 39 percent proficient......