Around the world, children are victims of human trafficking. From agricultural fields to factories to mines to big city streets, children are exploited for their labor in both the formal and informal economies. Worse yet, some children are trafficked into the global sex trade. This resource is the first of three textbooks in an anti-trafficking training manual that targets governments, workers’ organizations, employers’ organizations, and NGOs and international organizations. This textbook provides an overview of the child trafficking system, the actors involved and the scope of the problem. In addition, it provides research methods for combating trafficking in children and includes a glossary of useful terms and abbreviations.