The article below offers some good advice on college essay-writing. What else can we, as a dapertment, add to our knowledge of teaching the art of college essay-witing? If you have done this with your students, please post on the topic and I will add it to the department site.
So much of teaching college essay-writing depends on the question, really. I used to say that they had to be sure to do two things:
1) Make it personal and sincere. It's easy to see right through platitudes.
2) Answer the question directly. Being circumspect shows that you're either avoiding the question or can't organize your esay well.
Here's the article.