Spectrum: A Communicative Course in English, by Diane Warshawksy and Sandra Costinett (Donald R.H. Byrd, Project Director), is a complete six-level, four skills course for adult and young adult learners of English. Spectrum features a unique "natural" approach to language learning: Rich language input is provided in authentic conversations accompanied by receptive activities that help students absorb new functions, structures, and vocabulary. Real-life language tasks offer both focused practice and opportunities for natural interaction, promoting both fluency and accuracy. Students progress from the beginning to the advanced level as they follow a comprehensive and carefully graded syllabus.

Spectrum also features:
• Thematically based lessons
• Comprehensive coverage of all four skills
• Listening activities in both the Student Book and Workbook
• An audio program with authentic-sounding conversations, telephone messages, public announcements, and broadcasts
• A complete testing package