(a) “Member district” means one of the subdistricts into which a school district is or may be divided for the purpose of election of board members.

(b) “District method” means either a six district method, three district method, or two district method.

(c) “Election at large method” means election of board members without member districts.

(d) “Election at large” means an election at which all electors vote on all candidates.