There is one trainer on each side that can get you to the next level.
Expert (to 225)
Horde
* Hgarth (Stonetalon Mountains)
Expert (to 225)
Alliance
* Kitta Firewind (Elwynn Forest)
Artisan (to 300)
Horse and Alliance
* Annora (Uldaman)
That trainer will have some more recipes. Some of the recipes you'll want are drops so you may want to take a look in the AH.