By Luis Andres Henao THE ASSOCIATED PRESS NEW YORK (AP)- A coalition advocating for Native American people impacted by an oppressive system of boarding schools for Native youths plans to digitize 20,000 archival pages related to schools in that system that were operated by the Quakers. The Quakers and other faith groups, including Episcopalians, Methodists and Catholics, have in recent years either begun or increased efforts to research and atone for their prior roles in the boarding school system that Native children were forced to attend, and that cut them off from their families, tribes and traditions. For decades, documents related to Quaker-operated Indian boarding schools have been largely unstudied, as they exist in remote and dispersed collections with limited access, said leaders of the National Native American Boarding School…