 Specifically, ACT states that its scores provide an indicator of "college readiness", and that scores in each of the subtests correspond to skills in entry-level college courses in English, algebra, social science, humanities, and biology.According to a research study conducted by ACT, Inc. in 2003, there was a relationship between a student's ACT composite score and the probability of him or her earning a college degree.To develop the test, ACT incorporates the objectives for instruction from middle and high schools throughout the United States, reviews approved textbooks for subjects taught in Grades 7–12, and surveys educators on which knowledge skills are relevant to success in postsecondary education.