Interchange Fourth Edition is a four-level series for adult and young-adult learners of English from the beginning to the high-intermediate level.Interchange Fourth Edition Full Contact B with Self-study DVD-ROM, Level 2 includes: units 9-16 of the Student's Book, Workbook, and video worksheets, as well as the Self-study DVD-ROM.Interchange Fourth Edition Full Contact B with Self-study DVD-ROM, Level 2 includes: units 9-16 of the Student's Book, Workbook, and video worksheets, as well as the Self-study DVD-ROM.Interchange Fourth Edition is a four-level series for adult and young-adult learners of English from the beginning to the high-intermediate level. Interchange Fourth Edition Full Contact B with Self-study DVD-ROM, Level 2 includes: units 9-16 of the Student's Book, Workbook, and video worksheets, as well as the Self-study DVD-ROM.