Straight A students know that effective exam study requires tactics

It requires sussing out before you get stuck into exam study what the really essential must understand topics are, and making sure you understand those with your eyes shut and your hands behind your back like the back of your hand. Once your teen has that sorted, then they can move on to studying some of the more peripheral topics, and scrub up on the things that are going to secure that A grade, such as memorizing facts, quotes, etc whatever it is thats going to make their exam paper stand out from the rest. I cannot stress this idea enough.