A child learns itself. A teacher is only a helper. You can not teach a child anymore than you can grow a plant. The plant develops according to its own nature. The child also teaches itself. But you can help it to go forward in its own way. What you can do is not of positive nature but negative. You can take away the obstacles and knowledge comes out of its own nature. Loosen the soil a little so that it may come out easily and is not killed by anything .You can supply the growing seed with materials for the making up of its body bringing it the earth , the water ,the ait that it wants .And there your work stops.