Everything you need to understand or teach Armageddon Summer by Jane Yolen.
Inspired by the approach of the millennial year 2000, Armageddon Summer is the gripping story of two teenagers embroiled in family breakups and fanatical predictions that the world is coming to an end. Major characters Marina Marlow and Jed Hoskins meet when each accompanies a troubled parent to Reverend Beelson's armed encampment of Believers. There, while the Believers prepare to watch apocalyptic fires destroy everyone except their group, Marina and Jed struggle to come to terms with their own beliefs and the loss of control over their lives. The teenagers grow in self-awareness and compassion while they build a romantic friendship that helps them cope.