In the Northern Ontario bush, many families lived too far from communities to allow their children to attend school. As a way of providing education to these children of railroad workers, trappers, natives and other people of the bush the Canadian government instituted the school car system (in French: Des écoles sur rails).[definition needed]

At its peak, in the 1940s, as many as seven school trains travelled on the tracks of Northern Ontario. The school cars or "school on wheels" ran from 1926 to 1967, and stopped at each site on their route for three to five days out of a month.
One of the cars used as a classroom is currently a railcar museum in Clinton.
The number of cars was increased from 2 to 7, with the teacher and sometimes his wife and family.
| Teacher | Railroad | Area | Year Began | Length of Service | Notes |
|---|---|---|---|---|---|
| Fred Sloman, wife Cela, and children | Canadian National Railways (CNR) | Capreol West | 1926 | 39+ years | Car #15029, Ville Marie |
| Walter McNally | Canadian Pacific Railway (CP) | Chapleau East | 1926 | 13 years | Car #15019, Stadacona |
| William Wright | CP | Chapleau West | 1928 | 40 years | |
| William Fleming | CNR | Port Arthur North Branch | 1928 | approx 18 Years | |
| Andrew Clement | CNR | Port Arthur West, Sioux Lookout West, North Bay North | 1930 | 28 years | |
| Angus and Helen McKay | CNR | Sioux Lookout West, North Bay North | 1934 | 12 years | |
| Henry Antoniak | CNR | Sioux Lookout West, Port Arthur West | 1938 | Approx 10 years | |
| Cameron Bell | CP | Chapleau East | 1944 | 4 years | |
| James Chalmers | CNR | Port Arthur West | 1946 | 16 years | |
| Philip Fraser | CNR | Sioux Lookout West | 1946 | 19 years | |
| Florence Bell | CP | Chapleau East | 1948 | 1 year | |
| William Colcock | CP | Chapleau East | 1949 | 1 year | |
| Cecil Corps | CP | Chapleau East | 1950 | 3 years | |
Other types of mobile classroom school cars were converted sleeper cars used as mobile rule instruction cars. These were dropped off at various locations to provide education to railroad workers and test them on rules and procedures.