McAuley School District No. 27 - Credit: Wikimedia Commons
The McAuley School District No. 27 is a schoolhouse in Winfield Township, DuPage County, Illinois, west from West Chicago, Illinois. By the time the schoolhouse was added to the National Register of Historic Places in 1982, District 27 was the last fully functioning one-room school district in Illinois. The final schoolhouse was built in 1913 on a school lot used since the 1850s; it closed in 1991 and the school district annexed into West Chicago Elementary School District 33 in 1992. Read more on Wikipedia
Source: en.wikipedia.org