Winner of the International Federation for Family Development Award. When Dr Tom Harrison, a leading expert in the field of character education and the Internet, bought his daughter her first smartphone, a major milestone had been reached: she had entered the 'cyber-world'. Harrison no longer needed to know what to think; he needed to know what to do. This is the first practical book of its kind to show parents and teachers how to develop character as the foundation for helping young people to thrive in their online interactions. It answers the question: How do we prepare our children to do the right thing when no one is watching? Based on his own experience as a parent, more than a decade of research and thousands of conversations with parents, teachers, children and policymakers, the REACT and THRIVE models have been developed to engage with character, wellbeing, social and emotional learning, ethics and digital citizenship - all the ingredients for flourishing online. The world is waking up to the importance of character for individual and wider societal flourishing. Harrison is at the forefront of this movement and is regularly invited to advise policymakers and thousand of teachers and parents around the world. This book is a must-read for parents and educators who want to help children not just survive but thrive online in their cyber-worlds.