When we believe in lies, we cannot see the truth, so we make thousands of assumptions and we take them as truth. One of the biggest assumptions we make is that the lies we believe are the truth!
In a way, education by its nature favours the extrovert because you are taking kids and putting them into a big classroom, which is automatically going to be a high-stimulation environment. Probably the best way of teaching in general is one on one, but that's not something everyone can afford.