All good parents push you because they want you to do well.
Its your raging teenage hormones that cause you to see injustice in whats actually a very caring thing. There worried about you, and worried for your future.
Start behaving school, they say your only young once, but then again, you only go to school once, and if you fuck that up...
(Then again I was a pothead class clown with about fifty referells, and uber shit grades by the time I left school, and I just finished my BA degree in film production with honors...)
Just be glad you have loving and supporting parents, alot of kids would die to have parents like that.