Anyone can get A's without AP or IB classes. One AP/IB class? You should be ashamed to have less than a 4.0. Hell, I have 4 AP classes right now (US HIstory, Physics, Chemistry, Calculus BC), missed the whole semester (exchange), came for the finals to see where I'd be, and ACED THEM ALL (well, History was a 97% because of my essay-writing skills). But I worked my ass off for 5 months, doing double work (Slovene school and US school). Try THAT on for size.
Unfortunately I do not have a 4.0. My chemistry class was a bitch last year and I learned more than I ever have in a class, but the tests were insane and not curved (one test's average was 13%). Still 89.5% both semesters isn't bad for a teacher who doesn't give A's.