The best thing to do is limit your topic sentence so you can cut some of the material out of the essay.
I don't remember who said it, but there was a film director who commented once that the best film was on the floor. He meant that what he cut out of the film was better than what he released.
You could also hand in more than was asked for, but it had better have been good. In general teachers don't like that because it is not handled well. Sometimes too much material is not better than not enough.
