Mount Olympus Academy also known as MOA is the school the goddess girls and godboys attend in which almost everyone lives in a dorm (unlike Persephone who lives with her mother).The most popular goddess girls in MOA are Aphrodite, Athena, Persephone, and Artemis. They are the main characters in the entire Goddess Girls series, along with Medusa, a gorgon, Pandora, a curious mortal, and Pheme, a gossipy goddess.
The image is of the cover of Athena the wise and MOA is in the background.
Some of the classes at MOA include:
Beauty-ology
Revenge-ology
Beast-ology
Hero-ology