Graduate school is an advanced level of education that follows the completion of a bachelor's degree. It offers specialized programs, such as master's degrees and doctorates, allowing students to deepen their knowledge in a specific field. Graduate students often engage in research, complete projects, and may teach undergraduate courses. Admission to graduate school typically requires a strong academic record, letters of recommendation, and standardized test scores, such as the GRE or GMAT. Programs can vary in length, with master's programs usually taking one to two years, while doctoral programs may take several years to complete, depending on the field of study.