"Oh, how wonderful Mister Potter! Did everyone observe the precise movement of Mister Potter’s wand? Decisive and purposeful, yes, did you see?" the class nodded together, "None of this vague wand waving and hoping for the best - the real key to a successful summoning charm, is being able to clearly picture the item you want in your mind. In theory, if you are able to grasp the image of your desired item tightly in your mind’s eye, you should be able to summon it from nearly anywhere! If you can master that element of visualisation, I have every faith that you will all be able to correctly execute a summoning charm in your exams. Now," with a great sweep of his wand, the items that Harry had summoned, soared back to their places of origin, and more than one student had to duck to avoid being hit, "we have half an hour left of the class - I want you to pick the heaviest, furthest away object from you that you can see, and summon it to you by the end of the class. In the interest of safety, please do not summon objects that are not in this room, and please, do bear in mind any other students that stand between you and your target object - we want no holes in doors, and no concussions this morning, thank you,"