Laura watched as a Prefect did the spell and she smiled, for the first time this lesson she actually thought she might be able to do something, she thought about her hand before twisting her wand and then tapping it, hopefully that was right, well next was the saying of the spell. "Pre..Hen..So." or something like. "Prehenso." That was it surely, now she just had to think about putting it together but that would be harder to do.