The board of education of each city school district shall adopt a resolution on or before the first day of April, preceding the first annual school election held hereunder, dividing the city school district into school election districts. The city school district shall be so divided that if circumstances will permit, school election districts will be coterminous with one or more general election districts, and that, if practicable, there shall be a schoolhouse in each election district. The election districts thus formed shall continue in existence until modified by resolution of the board of education. Such resolution shall accurately describe the boundaries of such election districts by streets, alleys and highways, when practicable. School elections shall be held in such school election districts so far as may be possible in the public schoolhouses therein. If there is no public schoolhouse in a school election district, the board of education shall by resolution designate the place where the election in such district shall be held. Notwithstanding the foregoing provisions of this section, the board of education of any city school district of a city of less than ten thousand inhabitants may, by resolution, designate the entire city school district as a single school district.