Really good at math/science AND grammar.. terrible at AP Lang

<p>I just suck at AP Lang. Even though I know grammar (at least ACT grammar) pretty well, I am just crap in AP Lang. All of my essays are terrible. I've never been good at writing essays or even understood how. I usually get 4s on my in class essays.</p>

<p>Are there any ideas on how I can improve to the 6-8 range? I am really ready to work.</p>