Can one attend uni-classes or college-classes (math/physics) in germany while still in high school ? Or anything ?

So can one attend some higher level of math/physics so i dont have to waste my time in school on those subjects. I tried to find something but coudn't I could , only found foreign languages/politics/history as extra but no math/physics.So they should be in college/uni right ? I am alsmot 17 but in 10 grade because my german knowledge isn't that good (5 months in germany)(and didn't finish the end of the year in my home). But good enough if we arent discussing novels and such stuff. I thought of that because I read somewhere that it is possible to attend uni/college (no idea of the difference) classes while in school. Currently in Hannover. I am willing to pay , but not too much. I though about posting in /r/germany but decided to post here first.

Submitted November 22, 2016 at 05:14AM by emelrad12 http://ift.tt/2gG8PAB