Which of the following classes would you MOST need to do the following: (Aprender de memoria.)

la clase de arte
la clase de educación física
la clase de historia
la clase de frances

La clase de historia.

To learn something by heart or memorize it, the class you would most need is the class of French (la clase de francés). French classes often involve learning vocabulary, grammar rules, and dialogues, all of which require memorization to some degree.