These are the Schools enumerated in Battle Mastery, Natural History of Burlight, Natural History of Dorden, and Natural History of Ursyla. More will be coming in the future.
For more information about what Schools are and how they work, see BM, p. 44.
Schools of Alframe
Alster Strongshot Style
Ancient Morganthine Battlefield Sorcery
Anti-Abyssal Church Council/Abyss Reversal Magic
Arshoni Light-Weight Swashbuckling Style
Avalfian Forest Choir Oral Tradition
Dead Gun Game
Dikehorn Twin Ice Spirit Technique
Estelle-Style Pole Dancing
Finoan Forest Maintenance Techniques
Gumbey Abyss Technique Research Division
Haroon Magical Liberation Technique
Hiadem Magical Flow Manipulation Strikes
Ivar Frenzy Style
Kaslot Great Sand Fist/Batas School
Killgari Dual Blade Technique
Kingslay Close Quarter Bullet Arts
Legend of Harpoon King Nineruga
Makajahat Pro Grappling
Michal Style Circular Combat Arts
Narzaland Flexible Shield Style
Nernaeanin Aroma Beastmastery
Northern Fang Rock Breaker Style
Oakphalt Telekinesis
Orphid Fairy Evaporation Method
Scholten Mounted Combat
"Seven Colors of Mana" Summoning Arts Technique
Sombatyr Suppression Horseback Archery Corps
Ur di Gaul Secret Medicine Swordsmanship
Schools of Terastier
Agou Hammer Strike Style
Ardorian Style Martial Arts - Merciano School
Balfour Ninjutsu School (Barbarous School)
Casadorian War Song
El Elena's Dazzling Veil Dance Technique
Exorcist Martial Arts of Punishing Death
Gaon Peerless Beast Hurling Technique
Iron Wall Style of Logan the Crusader
Krause Style - Sword of the Supreme Ruler
Kuuheiken Fierce Dragon Riding
Marga-Hari Heaven and Earth Bayonet Art
Modified Kwaelan Method of Dark Archery
Phylasten School - Wind Style (Twin Sword Style)
Wald Style Battlefield Sword Slaying Method