Each World Geography investigation is designed around a central question and includes a collection of modified primary and secondary sources which offer students a range of perspectives from which to draw on when constructing their response. Each investigation is organized around seven disciplinary literacy tools that facilitate student talk and discussion as they prepare to write an interpretation style essay. Investigations include a collection of primary and secondary sources that offer students a range of perspectives about the central question. To support students and teachers, the following resources accompany each investigation: PPT to guide instruction, student packet of materials, a detailed teacher guide, samples of student writing scored using our argument writing rubrics, videos of students’ thinking about the material, videos that model for students how to analyze sources using the Bookmark tool, and EL supports in English, as well as translations of materials in Arabic and Spanish.