Education in medieval times focused on Christian subjects with an emphasis on Aristotle's rhetoric. Saint Augustine taught rhetoric and founded schools. Aristotle's rhetoric focused on persuasive appeals through logos, pathos, and ethos. Education was delivered through five canons: invention, arrangement, style, memory, and delivery. Scholasticism developed as a method of learning through dialectic, inference, and resolving contradictions. However, limitations in technology and the dominance of Aristotle's geocentric theories restricted scientific development.