Nearly 100 people watched 85 pupils, from years 1 to 8, perform several Maori songs, including Tutira Mai Nga Iwi.
The group finished the final line of the song with the cry "Hi aue hei'', many in the group presenting wide eyes and extended tongues to the appreciative crowd.
Library manager Linda Roxburgh called the performance "brilliant''.
"I wouldn't like to meet any of those boys in the dark,'' she told the group.
The performance was the first of many at the library to celebrate the week, including public performances by pupils from East Taieri School and Montessori Mosgiel tomorrow, Reid Park Kindergarten pupils on Thursday, and Elmgrove School pupils on Friday.
An indigenous group from Canada and the United States visited Te Kura Kaupapa Maori o Otepoti, Dunedin's full-immersion primary school, yesterday as part of language week.
Otepoti tumuaki Tiahuia Kawe-Small said the group was here as part of a delegation to the University of Otago.
Maori Language Week began yesterday and ends on Sunday.
