Interchange is a four-level, American English course that has been used by over 50 million students worldwide. This Level 1 Student's Book includes 16 units, eight progress checks, and a Grammar Plus
Interchange is a four-level, American English course that has been used by over 50 million students worldwide. This Intro level Workbook B provides six pages of additional practice for each unit in th
Interchange is a four-level, American English course that has been used by over 50 million students worldwide. This Level 3 Student's Book includes 16 units, eight progress checks, and a Grammar Plus
