Much larger than one room, probably a Consolidated School. From US218, turn west on 130th St and proceed to 160th Ave/W55 and then turn south to 140th St, and then turn west. Go 1/2 mile to 155th Ave and turn south to Mt. Hamill. First street on right/west is 142nd St; turn there and go one block to the school, which sits on 154th Ave just south of of 142nd.
This first shot is the south side of the school.
This shot is of the north side.
The following photos were provided via Val Root
A good history of the school can be found at: http://homepages.rootsweb.ancestry.com/~donnlibr/schools/mthamill.htm