What's the deal with school supplies?

Pens, Pencils, erasers, white out, rulers, memo notebooks, spiral notebooks, binders, every teacher wants something different and you lose points for not bringing them in! Of course you never use them. Even worse once you get to college you have to buy textbooks that costs hundreds of dollars but sell back for 10 dollars because they already made a new edition of your textbook. And you always have to wear the school gym uniform or you are "unprepared' and lose points.