I am not able to understand, why some people want, get on leaderboard. This App is not for get on the leaderboard, this app is for education. This is not a shooter game, this is not a mmo or rpg game. Education.
Because ranking promotes competition, and to some, competition is a great motivation for whatever they do - In this case, learning.
for me it is actually a motivation
@Hatsy Rei I refer to those kind of guys, who only want to get on leaderboard, and don not even care about getting educated.