Green Line. Get connected. Review the vocabulary anytime and anywhere, whether at home, during breaks, or on the bus ride to school. The complete vocabulary accompanying each lesson, many learning tips, clear word fields, and numerous exercises for practice after each unit. The solutions for self-checking can be found in the appendix. Students can easily download the vocabulary for Green Line 1 using the learning software phase-6 and practice independently right away. The vocabulary from Green Line is always and everywhere accessible with the PONS vocabulary trainer app.