It was on a crowded railway platform in Bhubaneshwar, India, that Maya Ajmera had what she calls her “moment of obligation”.

“In the midst of the dust and sunlight and trains and people there were about 25 children learning to read and write and there was a teacher in the middle of the circle, giving flash cards, teaching these kids literacy,” she says. “I was amazed by her energy and also by the extraordinary passion of these children wanting to learn, something we take for granted in the developed world.”