Grade skipping is a form of academic acceleration, often used for academically talented students, that enable the student to skip entirely the curriculum of one or more years of school. Grade skipping allows students to learn at an appropriate level for their cognitive abilities, and is normally seen in schools that group students primarily according to their chronological age, rather than by their individual developmental levels. Grade skipping is usually done when a student is sufficiently advanced in all school subjects, so that they can move forward in all subjects or graduate, rather than in only one or two areas. There are alternatives to grade skipping.