When Bethany Henderson first took the reins at D.C. sports and arts education nonprofit D.C. SCORES, the transition came with quick challenges. Just six weeks into her tenure, the organization lost 15 percent of its budget when a major funder abruptly changed its focus. In the struggle to keep the program afloat, Henderson saw opportunity, working with the nonprofit's board to re-examine everything from the nonprofit's work culture to its financial structure and the board's work. Now, Henderson…