The most popular and cost effective student loan is a federal loan. Federal loans are popular because they have a fixed rate of interest unlike private student loans. Federal Perkins Loans would be a good place to start. You can get more information at, http://studentaid.ed.gov/types/loans/plus.
You can go to the Financial Aid office at the school you want to attend. They will have an application you can fill out to see what you qualify for. They can advise you about grants and loans available to you.