Reclassification (education)
In education in the United States, reclassification or reclassing is the assignment of a student's high school (secondary school) graduation class to either a year earlier or later than their original. For young athletes, graduating a year earlier frees them to start their college sports career, with the hope of playing professionally sooner.
Source: Wikipedia — Reclassification (education) (CC BY-SA 4.0)