"Silence," the effect of the word, hissed lowly, was instantaneous. The students that had been eyeing Umbridge curiously, snapped immediately to Snape at the front of the class, who appraised them coldly. Harry listened to Snape’s lecture about the importance of the examinations at the end of that academic year with only half an ear, distracted somewhat by the furious scratching of Draco’s quill next to him. When he was confident Snape wasn’t looking in his direction, he peered over to see what Draco was doing, and found him furiously copying the instructions to brew the Draught of Peace from the textbook. Harry jumped at the sudden scraping of stools, as everyone got to their feet to retrieve their required ingredients from the store cupboard.