No more demanding than teaching children to brush their teeth regularly. Not that there is no more to spitting than to brushing teeth. Many are the subtleties of spitting at this level of accomplishment. For a start, there is the basic distinction between assisted and unassisted spitting. There are a number of carriers for assisted spitting, such as tobacco, paan and gutkha.
Some schools place more emphasis on orchestration than on individual performance.
This cursory description should convince anyone of the sophistication of spitting as an art form. But just as one does not need to be a priest to belong to a religion, so it is unnecessary that every child be raised to become a master of spitting. The basic purpose is served if the basics are imparted. Of course, not everyone will be content to stop at this. For those who want to achieve a deeper appreciation of this great heritage, there must be avenues for pursuing the quest.