A favorite buzzword in the education reform movement is accountability, applied usually to schools, teachers and students. An Emory University professor and epidemiologist questions the fairness of holding poor children accountable for school performance where there is little effort to address the barriers they face, including chronic illness, family violence or homelessness. In a guest column, an educator convicted in the epic APS test cheating trial addresses the lead prosecutor’s contention children in her school didn’t learn. And readers discuss the teacher in Dublin, Ga., who said neither President Barack Obama nor his supporters were Christians.