The biased place where the curriculum and teachers are predisposed to hand As to the esp science-philic, willing to do busy work, resourceful, esp english/humanities-philic, esp athletic people, basic algebra-philic who can read out of the worst quality edited textbook and do fine and don't need to think on how to study and can't explain how to study, and forget things as soon as they take finals, and people who are predetermined to have a gf/bf without effort, take awesome photos when they're not any way advantaged than you, be secretive about their personal lives, dislike math.
Typically constrained by dumb targets such as standardized tests and ridiculous AP Exams that limit you by the time you're a senior and are unable to generalize, believe they're disadvantaged and that teacher's actually teach when the real things are done through self-study of books.
High-Schools have a reputation for being holly-wood brainwashed to want relationships, complain about how stressed they are when it's nothing compared to college, wear oversized backpacks, carry excess books, are unaware of Amazon's usefulness, should look up bkstrs of top prepschools via google.