Flexible ProgressionAcceleration (Education)Ability GroupingContinuous Progress PlanCurriculum DesignNongraded Instructional GroupingStudent PromotionCurriculum Organization Advancement of students through an educational program at different rates, depending on their abilities, preferences, or other factors (Note: Prior to Mar80, the use of this term was not restricted by a Scope Note, and the instruction "Track System, USE Flexible Progression" was carried in the Thesaurus)