1) Your revision should be at least five pages long, with at least 2-3 pages of *new* material.
2) Research is required - at least one academic source. If you think you need to use a non-academic source (instead of an academic source, that is), you should discuss it with me instead of just doing it.
3) You should work at least twice as hard on a revision as you do on your weekly essays. Thus, doing the minimum amount of work necessary to make an existing essay two pages longer is usually a very bad approach. You should be showing me your best work.
4) You don't need to stick to the original prompt. You *do* need to have a clear, well-argued, well-supported argument, developed from the beginning to the end.