This Youth Voices Curriculum Sourcebook, developed as part of the IUCN World Conservation Congress Hawai'i 2016 to reach younger generations, aims to infuse nature into teaching and learning endeavors, to help (re)connect children and youth with nature, and to inspire their passion and action for its conservation now and into the future. This Sourcebook is intended as a flexible tool to complement and enhance existing school curricula. The activities are versatile and intended to be useful to teachers around the globe, even considering the realities of varying access to resources like time, materials, and technology. Most activities are low-tech or no-tech.