A group of children arrive from Rupert House/Waskaganish at the Bishop Horden Memorial School, a residential school in the indigenous Cree community of Moose Factory, Ontario, Canada circa 1940s. Picture taken circa 1940s. Shingwauk Residential Schools Centre/Handout via REUTERS.

A group of female students and a nun pose in a classroom at Cross Lake Indian Residential School in Cross Lake, Manitoba in a February 1940 archive photo. A Canadian policy of forcibly separating aboriginal children from their families and sending them to residential schools amounted to "cultural genocide," a six-year investigation into the now-defunct system found on June 2, 2015. The residential school system attempted to eradicate the aboriginal culture and to assimilate aboriginal children into mainstream Canada, said the long-awaited report by the Truth and Reconciliation Commission of Canada. REUTERS/Canada. Dept. Indian and Northern Affairs/Library and Archives Canada/e011080274/handout via Reuters

Children hold letters that spell "Goodbye" at Fort Simpson Indian Residential School, in Fort Simpson, Northwest Territories in a 1922 archive photo. A Canadian policy of forcibly separating aboriginal children from their families and sending them to residential schools amounted to "cultural genocide," a six-year investigation into the now-defunct system found on June 2, 2015. The residential school system attempted to eradicate the aboriginal culture and to assimilate aboriginal children into mainstream Canada, said the long-awaited report by the Truth and Reconciliation Commission of Canada. REUTERS/J.F. Moran/Library and Archives Canada/PA-102575/handout via Reuters

Boys pray on bunk beds in a dormitory at the Bishop Horden Memorial School, a residential school in the indigenous Cree community of Moose Factory, Ontario, Canada in 1950. Picture taken in 1950. Shingwauk Residential Schools Centre/Handout via REUTERS.

A teacher reads to students at a residential school in Aklavik, Northwest Territories, Canada circa 1950. Picture taken circa 1950. Shingwauk Residential Schools Centre/Handout via REUTERS.

Senior girl students sit on swings behind the Shingwauk Indian Residential School in Sault Ste. Marie, Ontario, Canada in 1960. Picture taken in 1960. Shingwauk Residential Schools Centre/Handout via REUTERS.

Shinwauk Guides form a circle during the visit of the commissioner to the Shingwauk Indian Residential School in Sault Ste. Marie, Ontario, Canada circa 1951. Picture taken circa 1951. Shingwauk Residential Schools Centre/Handout via REUTERS.

The Kuper Island Indian Residential School is seen on Penelakut Island, British Columbia in a June 19, 1941 archive photo. A Canadian policy of forcibly separating aboriginal children from their families and sending them to residential schools amounted to "cultural genocide," a six-year investigation into the now-defunct system found on June 2, 2015. The residential school system attempted to eradicate the aboriginal culture and to assimilate aboriginal children into mainstream Canada, said the long-awaited report by the Truth and Reconciliation Commission of Canada. REUTERS/Canada. Dept. of Indian and Northern Affairs/Library and Archives Canada/e011080322/handout via Reuters

Nurse Desrochers checks a girl's throat while other children wait in line, at the Frobish Bay Federal Hostel in Iqaluit, Nunavut, in a 1959 archive photo. A Canadian policy of forcibly separating aboriginal children from their families and sending them to residential schools amounted to "cultural genocide," a six-year investigation into the now-defunct system found on June 2, 2015. The residential school system attempted to eradicate the aboriginal culture and to assimilate aboriginal children into mainstream Canada, said the long-awaited report by the Truth and Reconciliation Commission of Canada. REUTERS/H. Leclair/Canada.

Boys pose on a field at the Shingwauk Indian Residential School in Sault Ste. Marie, Ontario, Canada circa 1960s. Picture taken circa 1960s. Shingwauk Residential Schools Centre/Handout via REUTERS.

Students pose in front of the Chooutla Indian Residential School, a residential school in the Carcross/Tagish First Nation community of Carcross, Yukon Territories, Canada in 1921. Picture taken in 1921. Shingwauk Residential Schools Centre/Handout via REUTERS.

Boys receive haircuts at the Shingwauk Indian Residential School in Sault Ste. Marie, Ontario, Canada circa 1960s. Picture taken circa 1960s. Shingwauk Residential Schools Centre/Handout via REUTERS.

Girls pose during a pageant at the Spanish Indian Residential School in Spanish, Ontario, Canada in 1954. Picture taken in 1954. Shingwauk Residential Schools Centre/Handout via REUTERS.

Boys play the Crokinole board game at the Shingwauk Indian Residential School in Sault Ste. Marie, Ontario, Canada circa 1947. Picture taken circa 1947. Shingwauk Residential Schools Centre/Handout via REUTERS.

Students attending the Shingwauk Indian Residential School use handmade bows in Sault Ste. Marie, Ontario, Canada in 1960. Picture taken in 1960. Shingwauk Residential Schools Centre/Handout via REUTERS.

Students taking part in a first communion ceremony pose at the Spanish Indian Residential School in Spanish, Ontario, Canada circa 1960s. Picture taken circa 1960s. Shingwauk Residential Schools Centre/Handout via REUTERS.

Boys play table hockey at the Shingwauk Indian Residential School in Sault Ste. Marie, Ontario, Canada circa 1960s. Picture taken circa 1960s. Shingwauk Residential Schools Centre/Handout via REUTERS.

Students sit in a classroom at All Saints Residential School in Lac la Ronge, Saskatchewan, Canada circa 1950. Picture taken circa 1950. Shingwauk Residential Schools Centre/Handout via REUTERS.

Senior girl students pose outside the Shingwauk Indian Residential School in Sault Ste. Marie, Ontario, Canada circa 1960s. Picture taken circa 1960s. Shingwauk Residential Schools Centre/Handout via REUTERS.

Students in costumes attend a pageant at the Spanish Indian Residential School in Spanish, Ontario, Canada in 1954. Picture taken in 1954. Shingwauk Residential Schools Centre/Handout via REUTERS.

Students sit in a classroom at St Joseph's Convent, otherwise known as the Fort Resolution Indian Residential School in Fort Resolution, Northwest Territories in an undated archive photo. A Canadian policy of forcibly separating aboriginal children from their families and sending them to residential schools amounted to "cultural genocide," a six-year investigation into the now-defunct system found on June 2, 2015. The residential school system attempted to eradicate the aboriginal culture and to assimilate aboriginal children into mainstream Canada, said the long-awaited report by the Truth and Reconciliation Commission of Canada. REUTERS/Library and Archives Canada/PA-042133/handout via Reuters

Students pose at All Saints Indian Residential School in Aklavik, Northwest Territories, Canada circa 1940. Picture taken circa 1940. Shingwauk Residential Schools Centre/Handout via REUTERS.

Boys stack wood at the Bishop Horden Memorial School, a residential school in the indigenous Cree community of Moose Factory, Ontario, Canada circa 1930s. Picture taken circa 1930s. Shingwauk Residential Schools Centre/Handout via REUTERS.

Girls attend a first communion ceremony at the Spanish Indian Residential School in Spanish, Ontario, Canada in 1955. Picture taken in 1955. Shingwauk Residential Schools Centre/Handout via REUTERS.