There are different categories: Quiz, and YesNo. You will receive points if you get an answer right. 

Under "Class" you can compare your results with those of your classmates. On the Leaderboard you can find the best players of the week from your school, your region or your country. Additionally you can get badges for certain achievements. For example, if you have reached a certain number of points or have played a game without any mistakes, you will be rewarded.