1980s, and I make no claim to having invented it - just that it was what I was doing, and that it worked but others hated it when they tried it out. However, I

1980s, and I make no claim to having invented it - just that it was what I was doing, and that it worked but others hated it when they tried it out. However, I did not hear the term spaced repetition until around 2000 or so and I realized it was very similar to what I used to do back in college.