With the start of the 1938-39 school year, 7th and 8th grade students from Slack School transferred to the Mattawan School. The rest of the school closed after the 1945-46 school year, and apparently never reopened.
1925-26 Ruth Rhodes
1927-28 Sylvia Dodson
1929-30 Sylvia Dodson
1930-31 Sarah Walker
1931-32 Bernice Carl
1932-38 Jennie L. Smith
1938-43 Nora Rawlinson
1943-46 Genevieve Brockway
"Slack School to close 2 grades"
Kalamazoo Gazette, 14 July 1938, page 13, column 7
List of one-room schools still standing in Kalamazoo County in 1982
- Hultmark, Sarah
- Manuscript, Local History Collection, Kalamazoo Public Library
Teachers' and school officers' directory, Kalamazoo County, Michigan, 1925-52
- Shelved in a pamphlet box with H 379.774 K149 (History Room Storage)