Teach with confidence, using the world's favorite English course. Interchange is a four-level, American English course that has been used by over 50 million students worldwide. This Level 3 Teacher's Edition features complete teaching instructions, optional activities, audio scripts, language summaries, and Student's Book and Workbook answer keys. The Complete Assessment Program comes on a USB and provides quizzes, mid-term and final tests in printable PDF and Microsoft Word formats. It also includes the complete Placement Test for Interchange and Passages.