Parents aren't always the best source of tutoring; especially when they themselves are not well educated or educated properly. 

A third type of teachers are the priests, who as silly as their worldview is, they at least give children a moral code more important than memorizing useless dates and names. 

In my opinion, phychologists make the best teachers, since they answer the individual questions of every patient, instead of pumping him with prepared answers from some book. But most people think you are crazy to need one, and they can be fairly expensive, so good luck there.