Greetings!
I think the very word "thesis" makes it sound scary and intimidating! All it is, really, is just a sentence (sometimes two) which tells your reader what the essay is going to be about. Generally, a thesis will take a position on a particular topic, and the rest of the essay will consist of information which supports that position.
For example, for a paper on global warming, you might say something like "Global warming is a direct result of modern industrialization's impact on the environment. Unless governments and big business take drastic steps to reduce man's footprint on the planet, life as we know it will cease to exist."
I hope this helps you get started!
Thanks,
Sarah, EssayForum.com
Sarah, EssayForum.com