The Mr. & Mrs. Will Rook Trophy was donated to the Winnipeg Music Festival in 1976. This trophy was originally awarded annually for the most outstanding performance by a School Choir. From 1977 until 2005, this trophy was been awarded annually for the most outstanding performance by an Elementary School Choir. It is currently awarded for the most outstanding performance by a School Girls Chorus, Kindergarten to Grade 6.
| Year | Winner | Year | Winner |
| 1976
|
Lord Wolseley School
|
1994
|
Tyndall Park School
|
| 1977
|
Maple Leaf School Choir
|
1995
|
Tyndall Park School
|
| 1978
|
Springfield Heights School
|
1996
|
Faraday Choir
|
| 1979
|
Angus McKay School
|
1997
|
École Garden Grove School
|
| 1980
|
Bertrun E. Glavin School
|
1998
|
Tyndall Park Community School
|
| 1981
|
Maple Leaf School
|
1999
|
École Garden Grove School
|
| 1982
|
Balmoral Hall
|
2000
|
Balmoral Hall School
|
| 1983
|
John de Graff School
|
2001
|
École Robert H. Smith School
|
| 1984
|
Donwood Elementary School
|
2002
|
Balmoral Hall School
|
| 1985
|
John de Graff School
|
2003
|
Maple Leaf School
|
| 1986
|
Donwood School
|
2004
|
Whyte Ridge Grade Four Choir
|
| 1987
|
Donwood School
|
2005
|
SJR Ensemble
|
| 1988
|
John de Graff School
|
2006 | Whyte Ridge Grades 3/4 Girls' Choir |
| 1989
|
Donwood School
|
2007 | Henry G. Izatt Girls’ Choir |
| 1990
|
John de Graff School
|
2008 | Bairdmore Belles |
| 1991
|
Donwood School
|
2009 | Henry G. Izatt Girls’ Choir |
| 1992
|
John de Graff School
|
2010 | HGI Girls' Choir |
| 1993
|
John de Graff School
|
2011 | Whyte Ridge Girls' Choir |