Why do highschool teachers shove a bunch of crap in mine and other students faces?

since federal gov't is not mandating what is suppose to be taught in schools, they are wanting to teach kids the liberal side of things, so they can all learn the same things, grow up to vote liberal cause that's all they will know. ANd then the gov't can have more people to support socialism, communism. teachers have no control over what they teach anymore, it sucks.