Spectrum: A Communicative Course in English, Level 4

* Workbooks: Correspond to the Student Book lessons and reinforce functions, structures, vocabulary, and pronunciation activities. * Teachers Editions: Contain teaching instructions interleaved with full-color student pages, along with answer keys (for Student Books and Workbooks) and listening scripts. * Audiocassette Programs: Contain realistic recordings of conversations that provide students with listening, pronunciation, and information practice.