Teaching and Learning are two sides of same coin
Learning and teaching go hand in hand. They are two sides of the same coin.. Among other things, good teaching demands continued learning. And good learning always in search of some teaching opportunity. A successful professional always has a desire to mentor someone. To be sure, there are no completely teaching tools or completely learning tools. Every learning tool has a teaching side to it and every teaching tool has learning side too. While using a teaching tool teacher is always concerned about its effects on learner, its learning demands and learning benefits.
By learning demands we mean the additional effort a student or a leaner needs to put to make the teaching tool effective. In a similar fashion, every learner, while using a learning tool must consciously ponder over its potentials as a teaching tool. In other words, teaching and learning are not two separate activities although they are distinct ones. (A class has to have two distinct groups learner and teacher). A better word to describe this phenomenon would be "learnteach" or "teachlearn"