In this paper we describe two episodes of instructional interaction, in which examples are used in order to help students face their misconceptions. We introduce the notions of pivotal example and ...

A new paper explores community-supported agriculture and its survival in the face of economic globalization. Organic food was once an economic haven for small farms who distributed their goods ...

This is a preview. Log in through your library . Abstract We present a counterexample to the conjecture by Orlik that the restriction of a free hyperplane arrangement to one of its hyperplanes is free ...

A Navy SEAL climbs up a ladder attached to the side of a gas and oil platform during training. “I serve with honor on and off the battlefield… I lead by example in all situations.” –Navy SEAL Creed ...