The school board of any school district in the county is authorized and empowered, in its discretion, to borrow money under the terms and conditions specified in this article for the purpose of making repairs, alterations and additions to school buildings of such school districts, for the purpose of erecting school buildings and other buildings used for school purposes, for the purpose of purchasing heating plants, air conditioning, fixtures and equipment for such buildings, for the purpose of purchasing land for school purposes, school buses and transportation equipment, and for the purpose of improving and equipping such lands for school recreational and athletic purposes.