Here is a list of grants that are available for US citizens
Unlike loans you don't have to pay back grants.
Financial aid is provided by the U.S. Department of Education's Federal Student Aid (FSA)
1) Federal Pell Grant
http://www.ed.gov/programs/fpg/index.html
2) Federal Supplemental Education Opportunity Grant
http://www.ed.gov/programs/fseog/index.html
3) Leveraging Educational Assistance Partnership (LEAP)
http://www.ed.gov/programs/leap/index.html
4) Robert C. Byrd Honors Scholarship Program
http://www.ed.gov/programs/iduesbyrd/index.html
Fill your FAFSA form and contact the Financial Aid representative of your Business school at the earliest.