who are these kind of peoples?
They are ethnic groups who are native to a particular place on Earth and live or lived in an interconnected relationship with the natural environment there for many generations prior to the arrival of non-Indigenous peoples.
Indigenous peoples
Indigenous peoples, also referred to as First peoples, First Nations, Aboriginal peoples, Native peoples, or autochthonous peoples, are ethnic groups who are native to a particular place on Earth and live or lived in an interconnected relationship with the natural environment there for many generations prior to the arrival of non-Indigenous peoples. 
when did the last residential school close in australia UNANSWERABLE what is canadian indian residential school system? It was a network of boarding schools for Indigenous peoples.
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Indigenous peoples [SEP] Introduction
Indigenous peoples, also referred to as First peoples, First Nations, Aboriginal peoples, Native peoples, or autochthonous peoples, are ethnic groups who are native to a particular place on Earth and live or lived in an interconnected relationship with the natural environment there for many generations prior to the arrival of non-Indigenous peoples. "Indigenous" first emerged as a way for European colonizers to differentiate enslaved Black people from the Indigenous peoples of the Americas, being first used in its modern context in 1646 by Sir Thomas Browne, who stated "Although... there bee... swarms of Negroes serving the Spaniard, yet they were all transported from Africa...