Most of us remember playing (or in my case, wanting to play) arcade games. The 'game over' screen would lead directly to the top ten scores and the three letter names of the winners.
I had no hope of featuring on any of these leader boards, but I could feature on my cousin's olympics tv game. ( tried to Google it now but I can't remember what it was called!)
Game designers have realised that only seeing the top ten will demotivate players, especially on games where all players around the world are put on to the same leader board. To get around this, they either show your position in relation to your friends who are playing the same game, or they show the players who are around you. In other words, four players up and four players down.
Educational apps should be doing the same thing. They should give the user a player to beat, and a player to stay ahead of. I know that an educational app needs a lot more than just a leader board, but I think, if used correctly, a leader board would be a great motivational tool.
This is Hells Tells signing out.