Everything you need to understand or teach The Farthest Shore by Ursula K. Le Guin.
In The Farthest Shore, the last novel in Le Guin's Earthsea Trilogy, the mythical world of Earthsea is threatened with annihilation. All the arts and crafts of human life are slipping into decay; people are losing the will to live and to create. Foremost among the eroding powers is the master power of magic.
The arch-mage of the school of wizards, Ged, sets out with Arren, a young prince destined to rule Earthsea...