The Forgetting Curve by Steven Friedland

Excellent summary on how learning theory informs teaching and learning.

Steven Friedland, The Forgetting Curve

Excerpt:

"Unlike a brain file, though, that information may well be forgotten, thanks to the Forgetting Curve.   The initial discovery of the Forgetting Curve occurred in 1885 when Ebbinghous postulated that humans forget much of the information they have learned.  We now know that after only twenty minutes, we lose approximately 50% of what we have learned.  After nine hours or so, we forget around 70%."

(Scott Fruehwald)