Henry barely looked up from his potion when the Professor came around to check his progress. As he said nothing, Henry assumed he was still on the right track and nothing needed correcting.

He proceeded to the next step, adding the next ingredient carefully before proceeding to do what was required. He was confident in his potion skills, confident enough he didn't waste time checking out what his fellow classmates were doing to see if they were doing anything different or trying to copy what he was doing. As far as Henry was concerned, all they had to do was follow the instructions and make sure they didn't skip a step or prepare their ingredients properly.