ABCNews -- The schools specialize in math, science or the arts. Some are Afro-centric, others are religious. They are publicly funded but operate independently of local schools boards and, often, teacher unions. They all make up the growing charter school movement that the Obama administration would like to see flourish. "The charter movement is absolutely one of the most profound changes in American education, bringing new options to underserved communities and introducing competition and innovation into the education system," Education Secretary Arne Duncan told attendees at the National Alliance for Public Charter Schools' annual conference last week. But not everyone agrees that charter schools should play an integral role in education reform....