The iEARN Teacher’s Guide to Online Collaboration & Global Projects is a resource designed to guide educators through the steps of planning and conducting an online, collaborative project with classrooms around the world. This online guide includes nine modules to help teachers plan and develop an iEARN project. Each module includes reflection activities to develop a project plan and additional resources to guide teachers in using technology tools to build international dialogue through global projects. Many people contributed ideas, resources, and lesson plans to this iEARN Teacher’s Guide. Special thanks to all of the dedicated iEARN educators around the world who contributed their project plans and stories, tips, advice, and best practices for designing projects that facilitate cross-cultural interaction and new learning opportunities online.