301.5  Purchase — exchange.
  In the purchasing of textbooks it shall be the duty of the board of directors to take into consideration the books then in use in the respective districts, and they may buy such additional number of said books as may from time to time become necessary to supply their schools, and they may arrange on equitable terms for exchange of books in use for new books adopted.
[C97, §2826; C24, 27, 31, 35, 39, §4449; C46, 50, 54, 58, 62, 66, 71, 73, 75, 77, 79, 81, §301.5]