However, some courses may be 1, 2, 4 or 5 credits. All degree programs require students to complete a minimum number of credit hours before graduation. Most Bachelor's degree programs in the United States do not require students to write a final thesis. Selection for admission to a graduate program is based on several criteria. These include completion of a Bachlor's degree, the student's undergraduate coursework, and their GPA. Students are also expected to write an essay as part of their application or submit a writing sample. Most Master's programs require students to have a minimum score on GRE, which tests verbal, quantitative, and analytical writing skills. If students continue to take courses at the graduate level, a final thesis is required for most Master's programs.