After the initial project conceptualization and design, we began by conducting basic research into the existing initiatives for embedding ESD, peace and global citizenship in textbooks around the world. Experts working at the interface of the core subjects (maths, science, language and geography) and sustainable development, peace and global citizenship were identified. Twenty-nine experts from around the world met at a workshop in Bangalore, India, in June 2016. They discussed the basic concept and developed the initial rudimentary ideas and structure of this guidebook. Five to six experts from each of the subject groups took on the role of contributing authors and chose a coordinating lead author (CLA) to oversee the writing of each subject chapter. Over the next nine months, the chapters went through a series of drafts. These were discussed and deliberated over, on numerous video conferences across time zones, within each subject group and with the editorial board. The final drafts of each chapter went through a blind peer review process, involving at least four reviewers, before making it into this guidebook. Our aim now is to train textbook writers around the world on the embedding approach, using this guidebook as a tool. The names of the contributing authors and CLAs are mentioned below, along with their email addresses. Please feel free to contact them if you have any queries about the subject chapters and guidebook. For any queries regarding the project, please contact the project management staff.