- English Unlimited is a six-level goals-based course for adults. Centred on purposeful, real-life objectives, it prepares learners to use English independently for global communication. The Cambridge online workbooks provide the course workbook content plus additional collaborative tools in a package that supports independent study and teacher-managed self-study. As part of a virtual learning world, the online workbooks allow students to collaborate and communicate, and enable teachers to track work and progress. They offer a classroom without walls for schools that wish to take their teaching into the digital age.