I'm all for this as long as no textbooks and other written materials, and overhead projector, audio-visuals, photographs, televisions, computers/monitors, laptops, smartphones, and other electronic devices, and classroom chalkboards, and written displays are not used in the classrooms by instructors or students.  Remember - the Hawaiian language was only spoken, and not written, before the arrival and subsequent immigration of the white "haole" to the Kingdom of Hawai'i.