Idaho Code § 33-1607

The board of trustees of any school district is authorized to provide instruction for Americanization of adult residents of the state, including classes in reading, writing and speaking the English language; the principles of the Constitution of the United States, American history, and such other subjects as deemed desirable for making, of such adults, better American citizens. The expense of such instruction shall be a lawful charge against the maintenance and operation funds of the district.