Andragogy (Greek: 'leading man/adult') is the art and science of helping adults learn, coined by Malcolm Knowles. It contrasts with pedagogy (teaching children). Andragogical principles recognise that adults are self-directed, bring rich life experience, have immediate readiness to learn, and are problem-centred. Teaching methods include self-directed learning, experiential learning, and collaborative discussion — all suited to adult learners' characteristics.