Information gathered from Vera Lantz by Sharon R. Becker (published on IAGenWeb) indicates that the McGraw school was built sometime prior to 1859 and was closed by 1919. However, a second school may have been built following the closure; a 1930's plat map shows a school at the same location.
| Official School Name | Union No. 6 |
|---|---|
| Parochial School Name | McGraw School |
| When Built | Circa 1859 |
| When Closed | Circa 1919 |