The document discusses important factors to consider when choosing a coursebook for teaching English. It explains that the coursebook is one of the few choices teachers have control over. An effective coursebook caters to both the teachers' and students' needs. For teachers, a good coursebook provides structure, materials, ideas and time savings. For students, it offers progression, independence, review and engagement. However, no single coursebook will perfectly suit every teacher and class, so compromises must be made. Teachers should supplement materials as needed and see the coursebook as a partner rather than something that dictates their entire lesson plans.