Usually the night before, or just before we go into the lesson. x3
That's if I even remember at all.
The last couple of tests we've had, I haven't studied at all! But I still managed to get a pretty good score. I'll walk into school on a test day, and be like "Morning, sunshines!!" And everyone will be like. "Ugh, how can you be all like that? I've been up all night studying." And then they'll get into a big debate over who's studied longest, and I'll just be like, " We have a test today??" And they'll get all freaked out like, "OMG Esther!! You need to start studying right now!" So I say I will, and then I don't.
So yeah.