With creativity now being emphasized in schools, it is important for teachers to understand what it is and how it is measured. This review of the literature is an attempt to make sense of the many definitions and measures of creativity. As a result, this comprehensive review shows that most definitions agree that there are at least two criteria to judge whether a person or a product is creative or not, originality and usefulness. Organized according to Rhodes's 3 P conceptualization of creativity--person, process, product, and press--more than 40 assessments used in creativity research were reviewed. Familiarity with the definitions, views of, and measurement of creativity can help teachers recognize and foster creativity in their students.