Iasevoli, B. (2018, March 29). ‘Looping’ With Students Boosts Learning, Especially for Kids of Color, Study Says. Retrieved September 30, 2019.

Economics professors Andrew Hill of Montana State University and Daniel Jones of the University of South Carolina conclude in the study that “looping,” in which an entire class moves to the next grade with the same teacher, results in a slight but significant increase in student achievement.