Think of this space as a kind and helpful message board through which you may solicit feedback. Try posting a couple of thesis statements and ask the class to vote on their favorite, for example. Or perhaps you're simply struggling with word choice. Please be sure to return the favor and offer a little feedback here and there as well.
If you need more inspiration, I offer you a quote from someone who understands your struggle:
"I would hurl words into this darkness and wait for an echo, and if an echo sounded, no matter how faintly, I would send other words to tell, to march, to fight, to create a sense of hunger for life that gnaws in us all."
~Richard Wright, American Hunger, 1977
Now hurl some of your own words out there and wait for an echo.