Briggs The Washington Post’s Bill Turque first reported this morning that State Superintendent of Education Deborah Gist has resigned and taken a position as Commissioner of Elementary and Secondary Education for the state of Rhode Island. Gist’s decision to leave doesn’t come as a huge surprise, given how she’d been largely relegated to a background role in the restructured DCPS system under Mayor Adrian Fenty and Schools Chancellor Michelle Rhee. Gist was appointed by…