Mount Slesse was designed and constructed in 1996, built according to the Middle School Philosophy. In October 1995, the principal was hired and immediately began the process of research, visitations and readings so that a personal vision could be established.
In December 1995, the vice principal was hired, the six team leaders being hired during January 1996. The idea of team building continued with the hiring of 36 full time teachers, 3 secretaries, 5 noon hour supervisors, 3 custodians and a business manager.
Parents were encouraged to become involved at a very early stage in the development of the school. From January - March 1996, parents from the surrounding elementary schools were informed about the Middle School philosophy and meetings were held to establish priorities for "their" school. On March 6, 1996 the first Parent Advisory Committee was held to begin working on the Mission Statement.
Students were also involved from the beginning. Each class was asked to select school colours, a school name and a school mascot. In the end, a timberwolf was the most popular choice and the school colours chosen were silver, black and teal.
In 2018, the School District went through reconfiguration and September 2018 saw a new intake of grade six classes.