School District No. 4 in Middlebury, in the County of Addison, a corporation duly established under the laws of this State, is hereby empowered and required to educate the scholars in the District in a grade 1 school or schools; and for that purpose may sell and convey any real estate belonging to the District, purchase, build, lease, and hold as many schoolhouses or school rooms, and establish and keep as many schools, and cause to be taught therein as extended a course of study as the District shall direct.