Call your school's financial aid office. The school may offer grant programs or fellowships. If not, ask your financial aid counselor for advice on where to look for additional aid.
Check with the U.S. Department of Education. It offers grants for both undergraduate and graduate students. For example, the Federal Pell Grant is awarded based on financial need. Other grants are more specific, such as the TEACH grant, which is awarded to students who wish to become teachers. This grant requires students to teach low-income students for four years following graduation.
Search for professional organizations in your field of study. Many organizations offer grants to students who meet certain qualifications. For example, if you are studying microbiology, search for aid at the American Society of Microbiology. Ask your school's financial aid office or career office to help find professional organizations in your field.
Check with any associations that you belong to such as national fraternities or sororities or honor societies.
Ask your employer if your company offers a tuition-reimbursement program. Some companies encourage employees to further their education by offering them free money. Often, in exchange for this aid, the company may require the employee to commit to work for the company for a certain period of time.