A Song of Shadows by Jenna Wolfhart

My new life at Otherworld Academy went from not-so-normal to downright-crazy fast. My best friend got turned into a shapeshifting beast, the Autumn Court tried to launch an assassination on the changelings, and I can somehow tap into the powers of all four courts.[*]
And that’s not including my insanely attractive fae instructors who make me feel like the temperature has gone up a thousand degrees.
But even though things were crazy before, it was nothing on how they are now. Danger lurks in every corner, new threats are closing in, and the storms are only growing larger. Now, I must learn to harness my powers with my four fae instructors, not only to save the changelings but the entirety of the faerie realm.