While looking at various wikipedia articles day in and day out, I figured it is really difficult to grasp a concept if i start reading from line one. I always scroll through for some examples down there of the concept and then look for the generalisation at the top. similar approach should be followed in teaching. The idea of a school is not to thrust knowledge but to create an environment where students seek learning. Its like recreating the atmosphere again to recreate the eureka moment for the students. So start with a simple example then ask why questions to reach the generalization. because that is how learning happens.