While you can sign up for help course by course, you get the most value when you sign up for a Chegg Study subscription. They offer two types of study courses, with both coming with homework help. While the Chegg Study Pack is more expensive ($19.95/mth versus $15.95/mth) you get so much more. It comes with unlimited course-specific docs, writing help, math help, and quiz and exam help. You can save more with a Chegg promo code.
The study pack also comes with a free subscription to Calm, an app that can help you manage your stress and sleep. Perfect for the over-stressed college student trying to get through finals week.