Trixie raised her hand once again.. The Shield spell? That was the same as the basic Shield Charm wasn't it? "That would be Protego Professor" the Slytherin smiled. Or at least that would be the one she would choose to use. It was probably the one most commonly used as well.

The Slytherin turned back to her notes quickly making sure there wasn't anything else she felt the need to have to jot down on the Parchment.