Well to be honest, I would argue that Sociology and Psychology could both be renamed the "Study of Common Sense". Reason being if you have good common sense these are the two easiest classes to take in life.

As for asking what the kid wants to know... I will clarify to make this more interesting. What would you teach him if he answered one of the following:

1) Your best subject

2) Your worst subject

3) I just want to play video games

4) I just want to watch reality television