Wait until you do your A Levels. My politics teacher said "We don't teach you politics we're teaching you how to pass an exam" So there you go. It's exactly the same at GCSE as well. And for you SATs, only time you sort of learn from what I can tell is at Uni, but I don't go to Uni so I can't say.
I didn't do any revision got some Bs some Cs and a D and an E. RAWR.