Section 116.02(1)(c), Wis.Stats., calls for the state superintendent to cause the convening of a convention annually on the day that the board of control holds its organizational meeting under s.116.02(1)(a), Wis.Stats., composed of representatives from each school board in the agency. 

Each school board has statutory duty to appoint a member as its representative for the purpose of determining the composition of the board of control and to cause a convention to be convened in accordance with s.116.02, Wis.Stats.