Complex sentence: The conference is split up into two divisions for all interscholastic activities, the primary criteria for the seperate divisions is school size, with the schools in the Lake Division being larger than the schools in the Prairie Division.
Split into simpler sentences: The conference is split up into two divisions for all interscholastic activities. The primary criteria for the seperate divisions is school size, with the schools in the Lake Division being larger than the schools in the Prairie Division.