The country’s newest and oldest civil-rights organizations are calling for a halt in opening new privately-managed charter schools. The NAACP compared expanding charter schools in poor communities to the sub-prime mortgage disaster, and expressed concerns that charters have increased school segregation rather than encouraging integration. Here in Maryland, charters are non-profits, authorized by local school boards. A third of Maryland’s pupils are African-American, but in charter schools here 4 out of 5 pupils are African American. Is that just because most of the state’s charters are located in Baltimore city? Do those who run charter schools represent public goals and values? We’ll talk to a reporter covering the national debate, a community activist and former charter school principal.