Nature School of Magic
Nature magic focuses the raw power of the elements into magical effects. Nature magic is balanced, offering a character an equal mix of utility, item enhancements, offensive and defensive spells. The offensive capability of nature magic, though useful, is not equal in power to that of battle magic. Nature magic also gives the caster power over certain elemental creatures and well as the power to deal elemental damage.
Some wonder why mend armor fits into this school, rather than Aegis or Enchantment. Aegis is the school of magical barriers, which means it only appears like a spell related to armor belongs there. Mend armor has nothing to do with Aegis. Enchantment deals with magical enhancement of equipment, improving things to become more powerful. Mend armor doesn't change the armor, only returns it to what it was once before. Mend armor is in nature because nature includes coaxing physical objects back to their proper state.