Ellen had a bag full of pencils. She gave out one pencil to everyone in the class. This is an example of distribution by sharing.
Sharing is a form of distributing, granting, giving or dividing a certain amount of things or element. The quantities in which "the elements" are divided among a set number of people may depend on the person or institution that makes the decision of sharing, therefore it varies. In this case, Ellen equally shared her pencils to everyone.