I have enough trouble no matter how many assignments I get

Could be cause they up'd the cirriculum this year for 6th this year :/
And i don't really like my teachers
Social Studies - Teacher barely even gives us work, miss 1 assignment and ffff
Science - Best teacher ive ever had.
Language arts - Nothing really bad just she yells half the time and her hgh pitched voice and pronunctiations make me cringe.
Math - Hurr go over 5 new things in 30 minutes heres homework go figure it out
So i hate everytime I get grades. Already had 3 D's this year. first D's I've ever had