Harry Potter for Kinect

Charms class is the second minigame you get to play in Year 1. It's also relatively simple. First the game will prompt you to yell "Wingardium Leviosa" and then place your hands above your head. Next, you'll have to cast at a feather. Aim at the feather and flick your wrist downward to cause it to levitate. Now do it again, this time with three feathers, and make sure you're accurate (if you miss, you'll lose points at the end that will lower your star rating). Once you cast on all three, the game will rate you. As long as you complete the class relatively quickly and are accurate with your spellcasting, you'll get this achievement easy.