The Burlington School District has five elementary schools: North Hill, Sunnyside, Grimes, Corse and Black Hawk. All are new buildings or have been recently completely rehabilitated, the newest, North Hill Elementary, received its first students in 2009, there are no elementary school buildings within the school district that are over 40 years old. The district has two middle schools: Edward Stone and Aldo Leopold. Beginning with the 2010–11 school year, students who had attended Oak Street Middle School (an aging building that was completed around 1907) began attending Aldo Leopold (named in honor of ecologist, and environmentalist, Aldo Leopold, a former resident of Burlington, and author of ""A Sand County Almanac""), the new school building is located near the corner of Sunnyside Avenue, and Roosevelt Avenue. Edward Stone, which opened at the start of the 2012–13 school year, is located near the corner of Lawrence Drive and Mason Road. The middle school was named in honor of former JPL head, and Burlington educated Dr. Edward Stone. This building replaced the James Madison Middle School building, which has only been in the system since the mid-1960s. These two new middle schools were built to accommodate more students after a third building, Horace Mann, was gutted by fire in 2005.