Interchange is a four-level, American English course that has been used by over 50 million students worldwide. This Level 2B Full Contact includes the second half of the Student's Book, Workbook, video activity sheets, and the Digital Pack. It has units 9-16, four progress checks, and a Grammar Plus section to ensure students receive all the practice they need. Inside each book is a single-use code for the Digital Pack to access the Digital Workbook with hundreds of self-graded exercises, audio, videos, and an eBook. The Digital Pack is mobile-friendly and can be used on a smartphone, tablet, or computer.