Wis. Stat. § 24.76: Common school fund.

All moneys accruing to the state by virtue of article X, section 2, of the constitution, and all other moneys paid into the state treasury on account of the capital of the school fund, constitute the school fund. All of said fund, except that portion set apart for state universities by s. 24.80, having been found necessary for the support and maintenance of common schools in each school district, and the purchase of suitable libraries and apparatus therefor, is set apart for those objects and denominated the “Common School Fund” which is a separate and perpetual fund.