[The sarcasm bounces right off Draco. He merely raises an eyebrow, wand still idly under his chin.]

Maybe you should. Flashcards, have people quiz you, anything that would help you retain information better. As for a Memory Potion, it's something that would allow you to have improved access to your memories. Faces would be easier to recognize, forgotten details or buried events from your past might come to light more easily. And so on and so forth. Though I doubt very much that I'd be able to find Jobberknoll feathers here, and they're an essential ingredient. I'd likely have to purchase them from Miss Margie.