Writing essays

<p>I don't know how to write one. I have read a book about it. It seemed to want to talk about what is in it not how to do it. I want to know the structure of an essay I have never done anything beside "introduction body body body conclusion". Like on an SAT and I think it is different.
It was a dummies book.</p>

<p>Is there a site that can show me how to write one, Or a book.</p>