The first time you enter your classroom you have to use the top right icon to edit your school class. You'll see a top-down of the class seating arrangement. Select a desk. Click button seven from the left to insert all the characters made in the AA Maker in your class to a random desk. To change the Character you want to play, click on the classbook in your room in the morning. You'll see the class seating arrangement. The character you're playing right now has a yellow star next to his picture. Just click on the chracter you want to play - You'll see the star icon next to his face. Now you control that player. Have fun!