I've been told ones with a connection to a tribe are better, and I'm unsure about the BIA connected ones, as I've only had personal experience with the Catholic run ones.
The one I'm most familiar with had a one hour a week class teaching their culture to K-12 students shortly after mass, and when they tried to get a traditional blessing at their graduation before the Christian prayer it was refused.
The one I'm most familiar with had a one hour a week class teaching their culture to K-12 students shortly after mass, and when they tried to get a traditional blessing at their graduation before the Christian prayer it was refused.