[The] invisible residue of old memories helps a person remember that same material again more quickly than before.
~Dr. Dan Willingham, a cognitive scientist at the University of Virginia, in a recent article in The Atlantic magazine
Katherine Rawson and John Dunlosky have called this practice“successive relearning. ”The thing that makes memories of what we’ve learned “indelible,” Willingham writes, is returning to that material again and again, writes Annie Murphy Paul in this article.