As a new breed of national education advocacy organizations gains clout, they're entering into often-uneasy relationships with teachers' unions--and running into a debate about whether they can play a grassroots "ground game" comparable to that of labor. For many unions, the policy changes the newer groups typically support--staffing based on performance measures and the expansion of charter schools, among others--tilt the balance of power away from teachers and unions and toward administrators and funders who, they argue, are less well-versed in the needs of teachers, students, and parents. Others view the entrance on the political scene of such groups as Stand for Children, Democrats for Education Reform, and StudentsFirst as a welcome development--one that adds fresh voices in a field that, at the local and state level at least, has been largely dominated by unions.