How come teachers dont actually give hard math work here in 7th grade?
But I skipped 7th grade math
If you want harder math, see if your school has a math club. I did it in middleschool and competed in lots of super awesome math compititions like MathCounts (http://mathcounts.org), the AMC 8 (https://www.maa.org/math-competitions/amc-8) and Math Madness (http://aretelabs.com/math_madness/about). Math club was where I really discovered my love for math and problem solving. Even if your school doesn't have a math club, you should be able to find a few old MathCounts rounds on their website and all the old AMC 8 compititions are available here (https://artofproblemsolving.com/community/c3413_amc_8).
Just find interesting, challenging math problems to work on outside of school, and maybe even bring some to school to work on when you have extra time in math class .