The Army of Volunteers Helping Migrants in the Calais Jungle

Earlier this year, Malcolm Astell left his job after 13 years teaching high school science in Yorkshire, U.K., and began considering how to use his skills before he took a new position. One option seemed most useful, he says: Teaching the refugees in the migrant camp in Calais, where thousands are now crowded into tents and rickety shelters in the unofficial settlement known as the Jungle, on the edge of the Channel that divides northern France and Britain.