How would you review for a college assessment test?

As a community college counselor, I frequently speak with students returning to college after a hiatus from school and math classes. If these students could complete a comprehensive review before they took our assessment test in MATH, I think they could score much higher and save themselves a few semesters of lower level math courses. I am unsure of how to direct them on your site to undertake such a review process. Could you give me your suggestions as to how my students could best put your site to work for them?