Any school district may, upon adoption of a resolution by a majority of its entire board of directors, designate specific school sponsored programs of instruction and extracurricular activities which the board believes present unusual physical hazards to students involved therein. Upon designating a hazardous program the board may authorize expenditure of school funds to purchase hospitalization and medical insurance covering students while engaged in the program, but said purchases of insurance shall be limited to instances wherein it has been determined by the board that the purchase of the same would constitute a financial hardship to the person or persons responsible for the support of the student. A school district purchasing insurance pursuant to this section shall not be obliged to purchase insurance for all activities which it may deem to be hazardous. All insurance under this section shall be awarded on a bid basis.