"Correct. 5 points to Slytherin." Harry smiled, it felt good to not only get it right but to be rewarded for it. "Today we will learn the first of the basic shield charms. The incantation is simply Protego. The wand movement is straightforward." With this he demonstrated a harsh and sharp line downwards. In Front of his wand appeared a slight shimmer. Almost undetectable. "Now I want everyone to pair off and perform this charm. Cast the banishing charm as your partner while they attempt to block it. Begin."